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Mathematics, 14.08.2021 05:50 annamariaafowyhrq

có 2 hộp sản phẩm. Hộp 1 chứa 17 sản phẩm tốt, 3 sản phẩm xấu. Hộp 2 chứa 18 sản phẩm tốt, 2 sản phẩm xấu. khách hàng thứ nhất chọn ngẫu nhiên một hộp và từ hộp đó lấy ra 2 sản phẩm. tính xác suất để người đó mua được 2 sản phẩm đều tốt

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có 2 hộp sản phẩm. Hộp 1 chứa 17 sản phẩm tốt, 3 sản phẩm xấu. Hộp 2 chứa 18 sản phẩm tốt, 2 sản phẩ...
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