题库搜索>问题求解PS-12264
There are 11 women and 9 men in a certain club. If the club is to select a committee of 2 women and 2 men, how many different such committees are possible?
分析A选项
分析B选项
分析C选项
分析D选项
分析E选项
从11个里面选2个有11*10/2=55种选法,同理9选2有9*8/2=36种选法,二者组合有55*36种方法,所以为1980种组合方式
默默
因为是同时发生,最终用乘法
HansonCheng回复默默
你又出来了 同时发生?? 我还去年发生呢 一件事没完成用乘法 完成用加法 谢谢你
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2019-06-19 13:35:26
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