Mathematics, 17.06.2021 06:40 smashbrosfan777
Một hộp có 15 bóng đèn, trong đó có 3 bóng hỏng. Một người lấy ngẫu
nhiên 3 bóng trong hộp để kiểm tra. Tính xác suất để
a. có bóng hỏng;
b. số bóng hỏng nhiều hơn số bóng không hỏng.
Answers: 2
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Một hộp có 15 bóng đèn, trong đó có 3 bóng hỏng. Một người lấy ngẫu
nhiên 3 bóng trong hộp để kiểm...
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