Mathematics, 15.09.2021 15:10 pareshrr
Hộp 1 chứa 3 bi trắng, k bi đỏ, 15 bi xanh. Hộp 2 chứa chứa 10 bi trắng, (k +1) bi đỏ, 9 bi xanh. Lấy ngẫu nhiên từ hộp 1 ra 2 viên bi, hộp 2 ra 1 viên bi. Tính xác suất để
Lấy được 1 bi đỏ
Lấy được ít nhất 1 bi xanh.
k là số 8
Answers: 3
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Hộp 1 chứa 3 bi trắng, k bi đỏ, 15 bi xanh. Hộp 2 chứa chứa 10 bi trắng, (k +1) bi đỏ, 9 bi xanh. Lấ...
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