Mathematics
Mathematics, 02.08.2021 14:00, tatejordan02

một lớp học có 20 người. Hỏi có bao nhiêu cách bầu ra một ban lãnh đạo gồm một lớp trưởng, một bí thư và một lớp phó. Yêu cầu không được bầu một người vào 2 hoặc 3 chức vụ

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một lớp học có 20 người. Hỏi có bao nhiêu cách bầu ra một ban lãnh đạo gồm một lớp trưởng, một bí th...

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