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Mathematics, 27.07.2021 14:00 Jerrikasmith28

Một hộp có 8 bi đỏ, 6 bi xanh. Lấy ngẫu nhiên 2 bi. Xác suất được 2 bi cùng màu là: (kết quả làm tròn đến chữ số thập phân thứ 3) 25 điểm

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Một hộp có 8 bi đỏ, 6 bi xanh. Lấy ngẫu nhiên 2 bi. Xác suất được 2 bi cùng màu là: (kết quả làm trò...
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