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Mathematics, 30.06.2021 01:30 hazelg

Trong một hộp có 60 cây vàng, 7 không đạt tiêu chuẩn, rút ngẫu nhiên 10 cây để kiểm tra. Tìm trung bình số cây không đạt tiêu chuẩn trong 10 cây này

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Trong một hộp có 60 cây vàng, 7 không đạt tiêu chuẩn, rút ngẫu nhiên 10 cây để kiểm tra. Tìm trung b...
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