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Mathematics, 04.08.2021 03:40 maritzahernandez32

. Có 2 hộp, mỗi hộp đựng 5 bi trắng và 6 bi đen. Lấy ngẫu nhiên từ hộp thứ nhất ra một bi bỏ vào hộp thứ hai, sau đó lấy ngẫu nhiên từ hộp thứ hai ra một bi. Xác suất để bi lấy ra lần hai màu đen là

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. Có 2 hộp, mỗi hộp đựng 5 bi trắng và 6 bi đen. Lấy ngẫu nhiên từ hộp thứ nhất ra một bi bỏ vào hộ...
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