Permutation & Combination
回答 (1)
2010-12-26 8:44 pm
✔ 最佳答案
The 1st man have 5 women choices.The 2nd man have 4 women choices.
The 3rd man have 3 woman choices.
The 4th man have 2 woman choices.
The 5th man have 1 woman choices.5 x 4 x 3 x 2 x 1 = 5! = 120 couples can be formed.
2010-12-26 12:45:31 補充：
It should be 120 (5 couples) can be formed.
收錄日期: 2021-04-21 22:17:54
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https://hk.answers.yahoo.com/question/index?qid=20101226000051KK00368