Mathematics, 09.11.2021 22:40 bradleycawley02

Có 5 viên bi xanh, 4 viên bi đen, 3 viên bi đỏ. Chia đều các viên bi vào 4 túi. Có bao nhiêu cách chia mà mỗi túi nào cũng có bi xanh và bi đen.

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Có 5 viên bi xanh, 4 viên bi đen, 3 viên bi đỏ. Chia đều các viên bi vào 4 túi. Có bao nhiêu cách ch...