Mathematics, 11.10.2021 20:00 michael1498

Một nhóm gồm 10 sinh viên trong đó có 1 sinh viên học lực giỏi, 6 sinh viên khá và 3 sinh viên trung bình. Chọn ngẫu nhiên 2 sinh viên, tính xác suất để chọn được 1 sinh viên khá.

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Một nhóm gồm 10 sinh viên trong đó có 1 sinh viên học lực giỏi, 6 sinh viên khá và 3 sinh viên trung...

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