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sửa đổi
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tìm GTNN
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Đặt a=cost;b=sintP=√3costsint+sin2t=√32sin2t−12cos2t+12=sinπ3sin2t−cosπ3cos2t+12=−cos(2t+π/3)+12từ đó ta thấy giá trị lớn nhất P=3/2 khi cos(2t+π/3)=−1 hay 2t+π/3=π+k2π→t=π/3+kπ hay (a,b)=(±1/2,±√3/2);còn giá trị nhỏ nhất P=−1/2 khi cos(2t+π/3)=1 hay 2t+π/3=k2π→t=−π/6+kπ hay (a,b)=(√3/2,−1/2) hay (a,b)=(−√3/2,1/2)
Đặt a=cost;b=sintP=√3costsint+sin2t=√32sin2t−12cos2t+12=sinπ3sin2t−cosπ3cos2t+12=−cos(2t+π/3)+12từ đó ta thấy giá trị lớn nhất P=3/2 khi cos(2t+π/3)=−1 hay 2t+π/3=π+k2π→t=π/3+kπ hay (a,b)=(±1/2,±√3/2);còn giá trị nhỏ nhất P=−1/2 khi cos(2t+π/3)=1 hay 2t+π/3=k2π→t=−π/6+kπ hay (a,b)=(√3/2,−1/2) hay (a,b)=(−√3/2,1/2)
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sửa đổi
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tổ hợp 11 (1)
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tổ hợp 11 (1) Bài style="mso-bidi-font-weight:
normal"> 17: style="font-size:12.0pt;mso-bidi-font-size:
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letter-spacing:.6pt;mso-no-proof:yes"> biển style="font-size:12.0pt;
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mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
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mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:
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11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-no-proof:yes"> 2 chữ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> số style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> lẻ style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.3pt;mso-no-proof:yes"> giống style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> nhau?
tổ hợp 11 (1) Bài 17: Một biển số xe gồm 2 chữ cái đứng trước và 4 chữ số đứng sau. Các chữ cái được lấy từ 26 chữ cái A, B, C, …, Z. Các chữ số được lấy từ 10 chữ số 0, 1, 2, …, 9. Hỏi:a) Có bao nhiêu biển số xe trong đó có ít nhất một chữ cái khác chữ cái O và các chữ số đôi một khác nhau?b) Có bao nhiêu biển số xe có hai chữ cái khác nhau và có đúng 2 chữ số lẻ giống nhau?
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sửa đổi
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tổ hợp 11 (2)
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tổ hợp 11 (2) Bài style="mso-bidi-font-weight:
normal"> 18: style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;mso-font-width:297%;mso-no-proof:yes"> a) style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.4pt;mso-no-proof:yes"> Có style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> bao nhiêu style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> tự style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.05pt;mso-no-proof:yes"> nhiênn style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> gồm style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:-.05pt;
mso-no-proof:yes"> 6 style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-no-proof:yes"> chữ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> số style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> khác style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.3pt;mso-no-proof:yes"> nhau mà tổng các chữ số đó style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.55pt;mso-no-proof:yes"> bằng style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> 18?
b) style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.4pt;mso-no-proof:yes"> Hỏi style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:-.05pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> bao nhiêu style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> lẻ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> thoả style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> mãn điều style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-no-proof:yes"> kiện style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> đó? * chỉ giùm em cách tính tổng nhé.
tổ hợp 11 (2) Bài 18: a) Có bao nhiêu số tự nhiên gồm 6 chữ số khác nhau mà tổng các chữ số đó bằng 18?b) Hỏi có bao nhiêu số lẻ thoả mãn điều kiện đó?* chỉ giùm em cách tính tổng nhé.
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sửa đổi
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tổ hợp 11 (3)
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tổ hợp 11 (3) Bài 21) Từ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> 10 chữ style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.05pt;
mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.05pt;mso-no-proof:yes"> 0, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.95pt;mso-no-proof:yes"> 1, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.95pt;mso-no-proof:yes"> 2, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.95pt;mso-no-proof:yes"> 3, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.95pt;mso-no-proof:yes"> 4, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.95pt;mso-no-proof:yes"> 5, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.95pt;mso-no-proof:yes"> 6, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.95pt;mso-no-proof:yes"> 7, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.95pt;mso-no-proof:yes"> 8, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.95pt;mso-no-proof:yes"> 9 có style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.05pt;
mso-no-proof:yes"> thể style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.0pt;mso-no-proof:yes"> lập style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.05pt;mso-no-proof:yes"> được style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.25pt;mso-no-proof:yes"> bao nhiêu style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.05pt;mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.05pt;mso-no-proof:yes"> khác style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.0pt;mso-no-proof:yes"> nhau style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.05pt;mso-no-proof:yes"> sao style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.05pt;mso-no-proof:yes"> cho trong các style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> chữ style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.3pt;
mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.55pt;mso-no-proof:yes"> đó style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> mặt style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.6pt;mso-no-proof:yes"> số style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-no-proof:yes"> 0 và style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> số style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> 1.
tổ hợp 11 (3) Bài 21) Từ 10 chữ số 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 có thể lập được bao nhiêu số khác nhau sao cho trong các chữ số đó có mặt số 0 và số 1.
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sửa đổi
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tổ hợp 11 (4)
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tổ hợp 11 (4) Bài style="mso-bidi-font-weight:
normal"> 22: a) style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
mso-font-width:242%;mso-no-proof:yes"> Tính style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-no-proof:yes"> tổng style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.55pt;mso-no-proof:yes"> của style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> tất style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.85pt;
mso-no-proof:yes"> cả style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.3pt;mso-no-proof:yes"> các style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.5pt;mso-no-proof:yes"> số style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> tự style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.55pt;mso-no-proof:yes"> nhiên style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> gồm style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> 5 style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> chữ style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.8pt;
mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.55pt;mso-no-proof:yes"> khác style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.5pt;mso-no-proof:yes"> nhau đôi style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-no-proof:yes"> một style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.85pt;mso-no-proof:yes"> được style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> tạo style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> thành
class="MsoNormal" style="margin-top:0in;margin-right:0in;margin-bottom:0in;
margin-left:17.35pt;margin-bottom:.0001pt;text-indent:21.35pt;line-height:13.65pt;
mso-line-height-rule:exactly">từ style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.05pt;mso-no-proof:yes"> 6 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> chữ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> số style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> 1, style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.45pt;mso-no-proof:yes"> 3, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.45pt;mso-no-proof:yes"> 4, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.45pt;mso-no-proof:yes"> 5, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.45pt;mso-no-proof:yes"> 7, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.45pt;mso-no-proof:yes"> 8.
b) style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;mso-font-width:268%;mso-no-proof:yes"> Có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.05pt;mso-no-proof:yes"> bao nhiêu style="font-size:
12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.8pt;
mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.05pt;mso-no-proof:yes"> tự style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> nhiên style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> gồm style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> 4 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> chữ style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.8pt;
mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.05pt;mso-no-proof:yes"> khác style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.75pt;mso-no-proof:yes"> nhau được style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.75pt;
mso-no-proof:yes"> tạo style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.8pt;mso-no-proof:yes"> thành style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> từ 5 style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> chữ style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.8pt;mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.05pt;mso-no-proof:yes"> 0, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.95pt;mso-no-proof:yes"> 1, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.95pt;mso-no-proof:yes"> 2, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.95pt;mso-no-proof:yes"> 3,
class="MsoNormal" style="margin-top:0in;margin-right:0in;margin-bottom:0in;
margin-left:17.35pt;margin-bottom:.0001pt;text-indent:21.35pt;line-height:13.7pt;
mso-line-height-rule:exactly">4. style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.45pt;mso-no-proof:yes"> Tính style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> tổng style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-no-proof:yes"> của style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.3pt;mso-no-proof:yes"> các style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> số style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-no-proof:yes"> này. * chỉ em cách tính chỗ in đậm với, dễ hiểu, gọn, nhanh nhé
tổ hợp 11 (4) Bài 22: a) Tính tổng của tất cả các số tự nhiên gồm 5 chữ số khác nhau đôi một được tạo thành từ 6 chữ số 1, 3, 4, 5, 7, 8.b) Có bao nhiêu số tự nhiên gồm 4 chữ số khác nhau được tạo thành từ 5 chữ số 0, 1, 2, 3, 4. Tính tổng của các số này.* chỉ em cách tính chỗ in đậm với, dễ hiểu, gọn, nhanh nhé
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sửa đổi
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tổ hợp 11 (5)
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tổ hợp 11 (5) Bài style="mso-bidi-font-weight:
normal"> 4: Có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> 5 style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> tyle="font-size:12.0pt;mso-bidi-font-size:
11.0pt;font-family:"Times New Roman","serif";color:black;mso-no-proof:yes">tem thư style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> khác style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.75pt;mso-no-proof:yes"> nhau và style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.75pt;
mso-no-proof:yes"> 6 style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.8pt;mso-no-proof:yes"> bì style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> thư style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> cũng style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> khác style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.75pt;mso-no-proof:yes"> nhau. style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.7pt;mso-no-proof:yes"> Người style="font-size:
12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-no-proof:yes"> ta muốn style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> chọn style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> từ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> đó style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> ra 3 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> style="font-size:
12.0pt;mso-bidi-font-size:11.0pt;font-family:"Times New Roman","serif";
color:black;letter-spacing:.1pt;mso-no-proof:yes">tem
thư, style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.95pt;mso-no-proof:yes"> 3 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> bì style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-no-proof:yes"> thư style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.8pt;mso-no-proof:yes"> và style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.75pt;mso-no-proof:yes"> dán style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> 3 style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.8pt;mso-no-proof:yes"> tyle="font-size:12.0pt;mso-bidi-font-size:11.0pt;font-family:"Times New Roman","serif";
color:black;mso-no-proof:yes">tem thư style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.8pt;mso-no-proof:yes"> ấy style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> lên style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> 3 style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.8pt;mso-no-proof:yes"> bì style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.6pt;mso-no-proof:yes"> thư style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.8pt;
mso-no-proof:yes"> đã style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.75pt;mso-no-proof:yes"> chọn style="font-size:12.0pt;mso-bidi-font-size:11.0pt;font-family:"Times New Roman","serif";
color:black;letter-spacing:-.15pt;mso-no-proof:yes">n. Một style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.85pt;mso-no-proof:yes"> bì style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> thư style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> chỉ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> dán style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> tyle="font-size:12.0pt;mso-bidi-font-size:
11.0pt;font-family:"Times New Roman","serif";color:black;letter-spacing:-.05pt;
mso-no-proof:yes">1 tem thư. style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.95pt;mso-no-proof:yes"> Hỏi style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> có
style="font-size:12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;
font-family:"Times New Roman","serif";mso-fareast-font-family:SimSun;
mso-fareast-theme-font:minor-fareast;color:black;letter-spacing:-.1pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes">bao nhiêu style="font-size:12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:
"Calibri","sans-serif";mso-fareast-font-family:SimSun;mso-fareast-theme-font:
minor-fareast;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes"> cách style="font-size:12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:
"Calibri","sans-serif";mso-fareast-font-family:SimSun;mso-fareast-theme-font:
minor-fareast;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes"> làm style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;line-height:115%;font-family:"Calibri","sans-serif";mso-fareast-font-family:
SimSun;mso-fareast-theme-font:minor-fareast;mso-bidi-font-family:Calibri;
color:black;letter-spacing:.35pt;mso-ansi-language:EN-US;mso-fareast-language:
ZH-CN;mso-bidi-language:AR-SA;mso-no-proof:yes"> như style="font-size:12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:
"Calibri","sans-serif";mso-fareast-font-family:SimSun;mso-fareast-theme-font:
minor-fareast;mso-bidi-font-family:Calibri;color:black;letter-spacing:.3pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes"> vậy?
tổ hợp 11 (5) Bài 4: Có 5 tem thư khác nhau và 6 bì thư cũng khác nhau. Người ta muốn chọn từ đó ra 3 tem thư, 3 bì thư và dán 3 tem thư ấy lên 3 bì thư đã chọn. Một bì thư chỉ dán 1 tem thư. Hỏi có bao nhiêu cách làm như vậy?
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sửa đổi
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tổ hợp 11 (6)
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tổ hợp 11 (6) Bài style="mso-bidi-font-weight:
normal"> 7: style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.2pt;mso-no-proof:yes"> Từ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> 5 style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.8pt;
mso-no-proof:yes"> bông style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.8pt;mso-no-proof:yes"> hồng style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> vàng, 3 style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.8pt;mso-no-proof:yes"> bông style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> hồng style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.8pt;
mso-no-proof:yes"> trắng style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.8pt;mso-no-proof:yes"> và style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.75pt;mso-no-proof:yes"> 4 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> bông style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.05pt;
mso-no-proof:yes"> hồng style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.8pt;mso-no-proof:yes"> đỏ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> (các style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.75pt;
mso-no-proof:yes"> bông style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.8pt;mso-no-proof:yes"> hoa xem style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.6pt;mso-no-proof:yes"> như style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.8pt;
mso-no-proof:yes"> đôi
class="MsoNormal" style="margin-top:0in;margin-right:0in;margin-bottom:0in;
margin-left:3.0pt;margin-bottom:.0001pt;text-indent:17.05pt;line-height:13.9pt;
mso-line-height-rule:exactly">một style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.85pt;mso-no-proof:yes"> khác style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.75pt;mso-no-proof:yes"> nhau), style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.95pt;mso-no-proof:yes"> người style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> ta muốn style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> chọn style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> ra một style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.85pt;mso-no-proof:yes"> bó style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> hóa style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.5pt;
mso-no-proof:yes"> gồm style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.1pt;mso-no-proof:yes"> 7 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> bông, style="font-size:
12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.95pt;
mso-no-proof:yes"> hỏi style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.1pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> bao nhiêu style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.55pt;mso-no-proof:yes"> cách style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-no-proof:yes"> chọn
class="MsoNormal" style="margin-top:0in;margin-right:0in;margin-bottom:0in;
margin-left:3.0pt;margin-bottom:.0001pt;text-indent:17.05pt;line-height:13.9pt;
mso-line-height-rule:exactly">bó style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.55pt;mso-no-proof:yes"> tyle="font-size:12.0pt;mso-bidi-font-size:11.0pt;font-family:"Times New Roman","serif";
color:black;letter-spacing:-.05pt;mso-no-proof:yes">hoa style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.05pt;mso-no-proof:yes"> trong đó:
a) style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.4pt;mso-no-proof:yes"> Có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> đúng style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> 1 bông style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> hồng style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> đỏ?
b) style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.4pt;mso-no-proof:yes"> Có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> ít style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.6pt;mso-no-proof:yes"> nhất style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.6pt;
mso-no-proof:yes"> 3 style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-no-proof:yes"> bông style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> hồng style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> vàng style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> và style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.5pt;mso-no-proof:yes"> ít style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.6pt;
mso-no-proof:yes"> nhất style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.6pt;mso-no-proof:yes"> 3 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> bông style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> hồng style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> đỏ? (chủ yếu)
tổ hợp 11 (6) Bài 7: Từ 5 bông hồng vàng, 3 bông hồng trắng và 4 bông hồng đỏ (các bông hoa xem như đôi một khác nhau), người ta muốn chọn ra một bó hóa gồm 7 bông, hỏi có bao nhiêu cách chọn bó hoa trong đó:a) Có đúng 1 bông hồng đỏ?b) Có ít nhất 3 bông hồng vàng và ít nhất 3 bông hồng đỏ? (chủ yếu)
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sửa đổi
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tổ hợp 11 (6)
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tổ hợp 11 (6) Bài style="mso-bidi-font-weight:
normal"> 8: style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;mso-font-width:403%;mso-no-proof:yes"> Từ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> 8 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> 0, style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.7pt;
mso-no-proof:yes"> 1, style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.7pt;mso-no-proof:yes"> 2, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.7pt;mso-no-proof:yes"> 3, style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.7pt;
mso-no-proof:yes"> 4, style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.7pt;mso-no-proof:yes"> 5, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.7pt;mso-no-proof:yes"> 6, style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.7pt;
mso-no-proof:yes"> 7 có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> thể style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> lập style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> được style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> bao nhiêu style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.8pt;mso-no-proof:yes"> gồm style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> 10 chữ style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.55pt;mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> được style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.5pt;
mso-no-proof:yes"> chọnn style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-no-proof:yes"> từ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> 8
class="MsoNormal" style="margin-top:0in;margin-right:0in;margin-bottom:0in;
margin-left:3.0pt;margin-bottom:.0001pt;text-indent:17.05pt;line-height:13.9pt;
mso-line-height-rule:exactly">chữ style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.3pt;mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> trên, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.2pt;mso-no-proof:yes"> trong đó style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> chữ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> số style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> 6 style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.1pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> mặt style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.6pt;mso-no-proof:yes"> đúng style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-no-proof:yes"> 3 lần style="font-size:12.0pt;mso-bidi-font-size:11.0pt;font-family:"Times New Roman","serif";
color:black;letter-spacing:-.15pt;mso-no-proof:yes">n, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.45pt;mso-no-proof:yes"> chữ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> số style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> khác style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.3pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> mặt style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.6pt;mso-no-proof:yes"> đúng style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-no-proof:yes"> 1 lần.
tổ hợp 11 (6) Bài 8: Từ 8 số 0, 1, 2, 3, 4, 5, 6, 7 có thể lập được bao nhiêu số gồm 10 chữ số được chọn từ 8 chữ số trên, trong đó chữ số 6 có mặt đúng 3 lần, chữ số khác có mặt đúng 1 lần.
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sửa đổi
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tổ hợp 11 (7)
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tổ hợp 11 (7) Bài style="mso-bidi-font-weight:
normal"> 10: a) style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.4pt;mso-no-proof:yes"> Có style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> bao nhiêu style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> tự style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> nhiênn style="font-size:
12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.1pt;
mso-no-proof:yes"> gồm style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:-.05pt;mso-no-proof:yes"> 6 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> chữ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> số style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> đôi style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.1pt;mso-no-proof:yes"> một style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.6pt;mso-no-proof:yes"> khác style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.5pt;
mso-no-proof:yes"> nhau (chữ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> đầu style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> tiên style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.1pt;
mso-no-proof:yes"> phải style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.1pt;mso-no-proof:yes"> khác
class="MsoNormal" style="margin-top:0in;margin-right:0in;margin-bottom:0in;
margin-left:3.0pt;margin-bottom:.0001pt;text-indent:17.05pt;line-height:13.9pt;
mso-line-height-rule:exactly">0), style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.2pt;mso-no-proof:yes"> trong đó style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> mặt style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.6pt;mso-no-proof:yes"> chữ style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.3pt;
mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.55pt;mso-no-proof:yes"> n style="font-size:12.0pt;mso-bidi-font-size:11.0pt;font-family:"Times New Roman","serif";
color:black;letter-spacing:-.05pt;mso-no-proof:yes">0 nhưng style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> không style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> chữ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> số style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-no-proof:yes"> 1).
b) style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.4pt;mso-no-proof:yes"> Có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> bao nhiêu style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.55pt;mso-no-proof:yes"> tự style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> nhiên style="font-size:
12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.1pt;
mso-no-proof:yes"> gồm style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:-.05pt;mso-no-proof:yes"> 7 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> chữ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> số, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.45pt;mso-no-proof:yes"> biết style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.6pt;mso-no-proof:yes"> rằng style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-no-proof:yes"> chữ style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.55pt;mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> 2 có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> mặt style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.6pt;
mso-no-proof:yes"> đúng style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-no-proof:yes"> 2 lần style="font-size:12.0pt;mso-bidi-font-size:11.0pt;font-family:"Times New Roman","serif";
color:black;letter-spacing:-.15pt;mso-no-proof:yes">n, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.45pt;mso-no-proof:yes"> chữ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> 3 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> có
class="MsoNormal" style="margin-top:0in;margin-right:0in;margin-bottom:0in;
margin-left:3.0pt;margin-bottom:.0001pt;text-indent:21.35pt;line-height:13.9pt;
mso-line-height-rule:exactly">mặt style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.6pt;mso-no-proof:yes"> đúng style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> 3 lần style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> và style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.3pt;
mso-no-proof:yes"> các style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.3pt;mso-no-proof:yes"> chữ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> số style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> còn style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> lại style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.1pt;
mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.55pt;mso-no-proof:yes"> mặt style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.6pt;mso-no-proof:yes"> không style="font-size:
12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> quá style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.3pt;mso-no-proof:yes"> một style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> lần.
tổ hợp 11 (7) Bài 10: a) Có bao nhiêu số tự nhiên gồm 6 chữ số đôi một khác nhau (chữ số đầu tiên phải khác 0), trong đó có mặt chữ số 0 nhưng không có chữ số 1).b) Có bao nhiêu số tự nhiên gồm 7 chữ số, biết rằng chữ số 2 có mặt đúng 2 lần, chữ số 3 có mặt đúng 3 lần và các chữ số còn lại có mặt không quá một lần.
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sửa đổi
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tổ hợp 11 (8)
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tổ hợp 11 (8) Bài style="mso-bidi-font-weight:
normal"> 11: Người style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.85pt;mso-no-proof:yes"> ta viết style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
mso-font-width:160%;mso-no-proof:yes"> các style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.25pt;
mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;mso-font-width:159%;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
mso-font-width:159%;mso-no-proof:yes"> 6 style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.3pt;
mso-no-proof:yes"> chữ style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.25pt;mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
mso-font-width:159%;mso-no-proof:yes"> bằng style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.3pt;
mso-no-proof:yes"> các style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.25pt;mso-no-proof:yes"> chữ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.25pt;mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
mso-font-width:159%;mso-no-proof:yes"> 1, style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.4pt;
mso-no-proof:yes"> 2, style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.15pt;mso-no-proof:yes"> 3, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.4pt;mso-no-proof:yes"> 4, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.4pt;mso-no-proof:yes"> 5 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> như style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.25pt;mso-no-proof:yes"> sau: style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.3pt;
mso-no-proof:yes"> Trong style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;mso-font-width:159%;mso-no-proof:yes"> mỗi style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.85pt;mso-no-proof:yes"> số
được style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.25pt;mso-no-proof:yes"> viết style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> một style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> chữ style="font-size:
12.0pt;mso-bidi-font-size:11.0pt;font-family:"Times New Roman","serif";
color:black;letter-spacing:-.05pt;mso-no-proof:yes">số style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> xuất style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> hiện style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> hai lần style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> còn style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.05pt;mso-no-proof:yes"> các style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.0pt;
mso-no-proof:yes"> chữ style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.05pt;
mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.3pt;mso-no-proof:yes"> còn style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.05pt;
mso-no-proof:yes"> lại style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.1pt;mso-no-proof:yes"> xuất style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> hiện style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.05pt;mso-no-proof:yes"> một style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
mso-font-width:160%;mso-no-proof:yes"> lần style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;font-family:"Times New Roman","serif";color:black;
letter-spacing:-.15pt;mso-no-proof:yes">n. Hỏi style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.6pt;mso-no-proof:yes"> có bao nhiêu style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> như style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> vậy?
tổ hợp 11 (8) Bài 11: Người ta viết các số có 6 chữ số bằng các chữ số 1, 2, 3, 4, 5 như sau: Trong mỗi sốđược viết có một chữ số xuất hiện hai lần còn các chữ số còn lại xuất hiện một lần. Hỏi có bao nhiêu số như vậy?
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sửa đổi
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tổ hợp 11 (9)
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tổ hợp 11 (9) Bài style="mso-bidi-font-weight:
normal"> 12: Từ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.25pt;mso-no-proof:yes"> một style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> tập style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.05pt;mso-no-proof:yes"> thể style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.25pt;mso-no-proof:yes"> 14 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> người style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.85pt;mso-no-proof:yes"> gồm style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.85pt;mso-no-proof:yes"> 6 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> năm style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.1pt;mso-no-proof:yes"> và style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.25pt;mso-no-proof:yes"> 8 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
mso-font-width:159%;mso-no-proof:yes"> nữ style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.25pt;
mso-no-proof:yes"> trong đó style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
mso-font-width:159%;mso-no-proof:yes"> có style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.3pt;
mso-no-proof:yes"> An style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.3pt;mso-no-proof:yes"> và style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.25pt;mso-no-proof:yes"> Bình, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.4pt;mso-no-proof:yes"> người style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.1pt;mso-no-proof:yes"> ta muốn
chọn style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-no-proof:yes"> một style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> tổ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> công style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> tác style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.3pt;mso-no-proof:yes"> gồm style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:-.05pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> 6 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> người. Tìm style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> số style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> cách style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-no-proof:yes"> chọn style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> trong mỗi style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:-.05pt;mso-no-proof:yes"> trường style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> hợp style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> sau:
a) style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.4pt;mso-no-proof:yes"> Trong style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> tổ style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-no-proof:yes"> phải style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:-.05pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> cả style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> nam lẫn style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-no-proof:yes"> nữ?
b) style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.4pt;mso-no-proof:yes"> Trong style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> tổ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> 1 tổ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> trưởng, style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.45pt;
mso-no-proof:yes"> 5 tổ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> viên style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> hơn style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.1pt;
mso-no-proof:yes"> nữa style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.5pt;mso-no-proof:yes"> Ann style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> và style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> Bình style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.1pt;
mso-no-proof:yes"> không style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-no-proof:yes"> đồng style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> thời style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:-.05pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> mặt style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-no-proof:yes"> trong tổ? (chủ yếu)
tổ hợp 11 (9) Bài 12: Từ một tập thể 14 người gồm 6 năm và 8 nữ trong đó có An và Bình, người ta muốnchọn một tổ công tác gồm có 6 người. Tìm số cách chọn trong mỗi trường hợp sau:a) Trong tổ phải có cả nam lẫn nữ?b) Trong tổ có 1 tổ trưởng, 5 tổ viên hơn nữa An và Bình không đồng thời có mặt trong tổ? (chủ yếu)
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sửa đổi
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tổ hợp 11 (10)
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tổ hợp 11 (10) Bài style="mso-bidi-font-weight:
normal"> 13: style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;mso-font-width:182%;mso-no-proof:yes"> Một style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
mso-font-width:160%;mso-no-proof:yes"> đồn style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;font-family:"Times New Roman","serif";color:black;
letter-spacing:-.05pt;mso-no-proof:yes">n tàu style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
mso-font-width:159%;mso-no-proof:yes"> 3 style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.05pt;
mso-no-proof:yes"> toa chở style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.2pt;mso-no-proof:yes"> khác. style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.4pt;mso-no-proof:yes"> Toa style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.25pt;mso-no-proof:yes"> I, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.4pt;mso-no-proof:yes"> II, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.15pt;mso-no-proof:yes"> III. style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.15pt;
mso-no-proof:yes"> Trên style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.05pt;mso-no-proof:yes"> sân style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.05pt;
mso-no-proof:yes"> an style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;font-family:"Times New Roman","serif";color:black;letter-spacing:-.05pt;
mso-no-proof:yes">ga có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
mso-font-width:159%;mso-no-proof:yes"> 4 style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.3pt;
mso-no-proof:yes"> khách style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.05pt;mso-no-proof:yes"> chuẩn style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> bị style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.1pt;mso-no-proof:yes"> đi style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.1pt;mso-no-proof:yes"> tàu.
Biết style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.85pt;
mso-no-proof:yes"> mỗi style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:-.05pt;mso-no-proof:yes"> toa có style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-no-proof:yes"> ít style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.6pt;mso-no-proof:yes"> nhất style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.6pt;
mso-no-proof:yes"> 4 style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-no-proof:yes"> chỗ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> trống. style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.45pt;
mso-no-proof:yes"> Hỏi: a) style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.4pt;mso-no-proof:yes"> Có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> bao nhiêu style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> cách style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.1pt;
mso-no-proof:yes"> sắp style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.55pt;mso-no-proof:yes"> xếp style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> cho 4 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> vị style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:-.05pt;mso-no-proof:yes"> khách style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-no-proof:yes"> lên style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.1pt;mso-no-proof:yes"> 3 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> toa.
b) style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;line-height:115%;font-family:"Calibri","sans-serif";mso-fareast-font-family:
SimSun;mso-fareast-theme-font:minor-fareast;mso-bidi-font-family:Calibri;
color:black;letter-spacing:.4pt;mso-ansi-language:EN-US;mso-fareast-language:
ZH-CN;mso-bidi-language:AR-SA;mso-no-proof:yes"> Có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:
"Calibri","sans-serif";mso-fareast-font-family:SimSun;mso-fareast-theme-font:
minor-fareast;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes"> bao nhiêu style="font-size:12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:
"Calibri","sans-serif";mso-fareast-font-family:SimSun;mso-fareast-theme-font:
minor-fareast;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes"> cách style="font-size:12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:
"Calibri","sans-serif";mso-fareast-font-family:SimSun;mso-fareast-theme-font:
minor-fareast;mso-bidi-font-family:Calibri;color:black;letter-spacing:.1pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes"> sắp style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;line-height:115%;font-family:"Calibri","sans-serif";mso-fareast-font-family:
SimSun;mso-fareast-theme-font:minor-fareast;mso-bidi-font-family:Calibri;
color:black;letter-spacing:.35pt;mso-ansi-language:EN-US;mso-fareast-language:
ZH-CN;mso-bidi-language:AR-SA;mso-no-proof:yes"> xếp style="font-size:12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:
"Calibri","sans-serif";mso-fareast-font-family:SimSun;mso-fareast-theme-font:
minor-fareast;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes"> cho 4 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:
"Calibri","sans-serif";mso-fareast-font-family:SimSun;mso-fareast-theme-font:
minor-fareast;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes"> vị style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;line-height:115%;font-family:"Calibri","sans-serif";mso-fareast-font-family:
SimSun;mso-fareast-theme-font:minor-fareast;mso-bidi-font-family:Calibri;
color:black;letter-spacing:-.05pt;mso-ansi-language:EN-US;mso-fareast-language:
ZH-CN;mso-bidi-language:AR-SA;mso-no-proof:yes"> khách style="font-size:
12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif";
mso-fareast-font-family:SimSun;mso-fareast-theme-font:minor-fareast;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-ansi-language:EN-US;mso-fareast-language:
ZH-CN;mso-bidi-language:AR-SA;mso-no-proof:yes"> lên style="font-size:12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:
"Calibri","sans-serif";mso-fareast-font-family:SimSun;mso-fareast-theme-font:
minor-fareast;mso-bidi-font-family:Calibri;color:black;letter-spacing:.1pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes"> tàu style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;line-height:115%;font-family:"Calibri","sans-serif";mso-fareast-font-family:
SimSun;mso-fareast-theme-font:minor-fareast;mso-bidi-font-family:Calibri;
color:black;letter-spacing:.35pt;mso-ansi-language:EN-US;mso-fareast-language:
ZH-CN;mso-bidi-language:AR-SA;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:
"Calibri","sans-serif";mso-fareast-font-family:SimSun;mso-fareast-theme-font:
minor-fareast;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes"> tyle="font-size:12.0pt;mso-bidi-font-size:
11.0pt;line-height:115%;font-family:"Times New Roman","serif";mso-fareast-font-family:
SimSun;mso-fareast-theme-font:minor-fareast;color:black;letter-spacing:-.05pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes">1 toa có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:
"Calibri","sans-serif";mso-fareast-font-family:SimSun;mso-fareast-theme-font:
minor-fareast;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes"> 3 style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;line-height:115%;font-family:"Calibri","sans-serif";mso-fareast-font-family:
SimSun;mso-fareast-theme-font:minor-fareast;mso-bidi-font-family:Calibri;
color:black;letter-spacing:-.1pt;mso-ansi-language:EN-US;mso-fareast-language:
ZH-CN;mso-bidi-language:AR-SA;mso-no-proof:yes"> trong 4 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:
"Calibri","sans-serif";mso-fareast-font-family:SimSun;mso-fareast-theme-font:
minor-fareast;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes"> vị style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;line-height:115%;font-family:"Calibri","sans-serif";mso-fareast-font-family:
SimSun;mso-fareast-theme-font:minor-fareast;mso-bidi-font-family:Calibri;
color:black;letter-spacing:-.05pt;mso-ansi-language:EN-US;mso-fareast-language:
ZH-CN;mso-bidi-language:AR-SA;mso-no-proof:yes"> khách style="font-size:
12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif";
mso-fareast-font-family:SimSun;mso-fareast-theme-font:minor-fareast;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.1pt;mso-ansi-language:EN-US;mso-fareast-language:
ZH-CN;mso-bidi-language:AR-SA;mso-no-proof:yes"> nói style="font-size:
12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif";
mso-fareast-font-family:SimSun;mso-fareast-theme-font:minor-fareast;mso-bidi-font-family:
Calibri;color:black;letter-spacing:-.05pt;mso-ansi-language:EN-US;mso-fareast-language:
ZH-CN;mso-bidi-language:AR-SA;mso-no-proof:yes"> trên.
tổ hợp 11 (10) Bài 13: Một đồn tàu có 3 toa chở khác. Toa I, II, III. Trên sân ga có 4 khách chuẩn bị đi tàu.Biết mỗi toa có ít nhất 4 chỗ trống. Hỏi:a) Có bao nhiêu cách sắp xếp cho 4 vị khách lên 3 toa.b) Có bao nhiêu cách sắp xếp cho 4 vị khách lên tàu có 1 toa có 3 trong 4 vị khách nói trên.
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sửa đổi
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tổ hợp 11 (11)
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tổ hợp 11 (11) Bài style="mso-bidi-font-weight:
normal"> 14: Trong style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> 16 style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> học style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.5pt;mso-no-proof:yes"> sinh có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> 3 style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> học style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.55pt;mso-no-proof:yes"> sinh giỏi, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.7pt;mso-no-proof:yes"> 5 style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> khá, style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.7pt;mso-no-proof:yes"> 8 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> trung style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> bình. style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.7pt;
mso-no-proof:yes"> Có style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.8pt;mso-no-proof:yes"> bao nhiêu style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.8pt;
mso-no-proof:yes"> cách style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> style="font-size:
12.0pt;mso-bidi-font-size:11.0pt;font-family:"Times New Roman","serif";
color:black;letter-spacing:-.05pt;mso-no-proof:yes">chia số
học style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.3pt;mso-no-proof:yes"> sinh đó style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-no-proof:yes"> thành style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> hai tổ, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.2pt;mso-no-proof:yes"> mỗi style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:-.05pt;
mso-no-proof:yes"> tổ style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-no-proof:yes"> 8 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> học style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> <span style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;font-family:"Times New Roman","serif";color:black;
letter-spacing:-.1pt;mso-no-proof:yes">sinh sao cho mỗi style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:-.05pt;
mso-no-proof:yes"> tổ style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.55pt;mso-no-proof:yes"> đều style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> học style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> sinh giỏi style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.1pt;mso-no-proof:yes"> và style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.5pt;mso-no-proof:yes"> mỗi style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:-.05pt;
mso-no-proof:yes"> tổ style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.55pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> ít
nhất style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.6pt;mso-no-proof:yes"> hai học style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.3pt;
mso-no-proof:yes"> sinh khá.
tổ hợp 11 (11) Bài 14: Trong số 16 học sinh có 3 học sinh giỏi, 5 khá, 8 trung bình. Có bao nhiêu cách chia sốhọc sinh đó thành hai tổ, mỗi tổ 8 học sinh sao cho mỗi tổ đều có học sinh giỏi và mỗi tổ có ítnhất hai học sinh khá.
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sửa đổi
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hì
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hì
Normal
0
false
false
false
MicrosoftInternetExplorer4
Cho hình chóp S.ABCD
đáy ABCD là hình bình hành tâm O.Một mặt phẳng (P) lần lượt cắt các cạnh
SA,SB,SC tại A’,B’,C’
Dựng giao điểm D’ của
mặt phẳng (P) với cạnh SD
/* Style Definitions */
table.MsoNormalTable
{mso-style-name:"Table Normal";
mso-tstyle-rowband-size:0;
mso-tstyle-colband-size:0;
mso-style-noshow:yes;
mso-style-parent:"";
mso-padding-alt:0in 5.4pt 0in 5.4pt;
mso-para-margin:0in;
mso-para-margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:10.0pt;
font-family:"Times New Roman";
mso-ansi-language:#0400;
mso-fareast-language:#0400;
mso-bidi-language:#0400;}
hì
Normal
0
false
false
false
MicrosoftInternetExplorer4
Cho hình chóp S.ABCD đáy ABCD là hình bình hành tâm O.Một mặt phẳng (P) lần lượt cắt các cạnh SA,SB,SC tại A’,B’,C’Dựng giao điểm D’ của mặt phẳng (P) với cạnh SD
/* Style Definitions */
table.MsoNormalTable
{mso-style-name:"Table Normal";
mso-tstyle-rowband-size:0;
mso-tstyle-colband-size:0;
mso-style-noshow:yes;
mso-style-parent:"";
mso-padding-alt:0in 5.4pt 0in 5.4pt;
mso-para-margin:0in;
mso-para-margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:10.0pt;
font-family:"Times New Roman";
mso-ansi-language:#0400;
mso-fareast-language:#0400;
mso-bidi-language:#0400;}
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sửa đổi
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toán chuyển động
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toán chuyển động Người đi xe đạp từ A đến B dài 60km. Sau đó 2 giờ có một người đi xe máy từ A đến B với vận tốc gấp 5 lần vận tốc xe đạp . Tìm vận tốc mỗi người biết rằng hai người gặp nhau cách B 37,5km.
toán chuyển động Người đi xe đạp từ A đến B dài 60km. Sau đó 2 giờ có một người đi xe máy từ A đến B với vận tốc gấp 5 lần vận tốc xe đạp . Tìm vận tốc mỗi người biết rằng hai người gặp nhau cách B 37,5km.
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