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Mathematics, 18.06.2021 21:40 xaguilar

Một lớp có 50 sinh viên nữa và 30 sinh viên nam. Kiểm tra ngẫu nhiên 43 sinh viên. Tìm xác suất để trong đó: có 3 sinh viên nam, b: có ít nhất 1 sinh viên nam

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