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Mathematics, 20.06.2021 17:40 savyblue1724707

Một tổ gồm 18 người có 9 nam và 12 nữ.Chọn ngẫu nhiên 4 người để trực cổng trường. Tính sác xuất các trường hợp sau Chọn được số nam nhiều hơn số nữ Tổ đó chia làm 3 nhóm mỗi nhóm đều nhau nam và nữ để tham gia tình nguyện hề

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Một tổ gồm 18 người có 9 nam và 12 nữ.Chọn ngẫu nhiên 4 người để trực cổng trường. Tính sác xuất các...
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