单选题:红、黑、白三种颜色的球各10个。把它们全部放人甲、乙两个袋子中,要求每个袋子里羔种颜色的球都有,且甲、乙两个袋子中三种颜

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题目内容:
红、黑、白三种颜色的球各10个。把它们全部放人甲、乙两个袋子中,要求每个袋子里羔种颜色的球都有,且甲、乙两个袋子中三种颜色的球数之积相等,那么共有(  )种放法? A.25
B.27
C.29
D.30

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