题库搜索>问题求解PS-12470
A certain club has 20 members. What is the ratio of the number of 5-member committees that can be formed from the members of the club to the number of 4-member committees that can be formed from the members of the club?
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选5个人组成committee的组合数是C5/20，选4个人组的话就是C4/20，C5/20 : C4/20=16:5
662352yo
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2023-01-09 13:52:11
猜猜酱
以为问的是20个人分别能分成多少个5人和4人小组
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2022-08-18 01:46:12
猜猜酱回复猜猜酱
想通了，这是常识啊家人们，不是每个人都能进committee当委员的，所以不能理解成平均分多少个小组。是选5个人
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2022-08-18 01:48:23
猜猜酱
真无语
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2022-08-18 01:45:09
默默
ratio是比值的意思
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2018-05-10 20:22:31
默默回复默默
随意抽5人，排列组合
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2018-05-10 20:23:05
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