Can someone please help!?
6 balls to be placed in 4 cups. each cup must have at least one ball and no empty cups allowed. How many different combination would be possible?
THANKS!!
举报
只能是2,1,1,2
或3,1,1,1
两种情况 .列式相加就行
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发表于 2004-11-26 08:10:00
