數學 nPr and nCr
2010-12-11 7:50 pm
In an assembly of 100 persons,15 are englishmen.In how many ways can a committee of 5 persons be formed so as to include at least 1 englishmen?
回答 (1)
2010-12-11 7:55 pm
✔ 最佳答案
All ways - No englishmen ways :100C5 - (100-15)C5= 75287520 - 32801517= 42486003 ways
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20101211000051KK00468