Một hộp có 7 bi đỏ, 3 bi vàng và 5 bi xanh có
kích thước như nhau. Người ta lấy ra ngẫu
nhi...
Mathematics, 19.09.2021 09:10 mylanag12
Một hộp có 7 bi đỏ, 3 bi vàng và 5 bi xanh có
kích thước như nhau. Người ta lấy ra ngẫu
nhiên 5 bi.
Tìm xác suất của biến cố trong 5 bi đó có ít
nhất 3 bi xanh.
Answers: 2
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