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Mathematics, 18.06.2021 19:30 naajaae328

Bạn thỷ bốc ngẫu nhiên 1 bi từ hộp i có 6 bi đỏ ,7 xanh,8 vàng , 9 trắng .Bán lợi bốc ngẫu nhiên 1 bi từ hộp 2 có 4 đỏ 3 xanh 2 vàng 1 trắng .Biết rằng bốc ra 2 bi cùng màu, tính xác suất để đó là 2 bi đỏ

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Bạn thỷ bốc ngẫu nhiên 1 bi từ hộp i có 6 bi đỏ ,7 xanh,8 vàng , 9 trắng .Bán lợi bốc ngẫu nhiên 1 b...
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