Mathematics, 03.08.2021 06:10 Fangflora3

Có 40 học sinh gồm 25 nam và 15 nữ. Hỏi có bao nhiêu cách chọn 4 học sinh trong đó có 1 nam và 3 nữ

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Có 40 học sinh gồm 25 nam và 15 nữ. Hỏi có bao nhiêu cách chọn 4 học sinh trong đó có 1 nam và 3 nữ...

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