Problem 3: In how many ways can a nine-person club select a two-person executive committee from among its members?
Problem 4: In how many ways can a nine-person club select a president and a two-person executive advisory board from among its members (assuming that
the president is not on the advisory board)?
probability question 3.4
2012-02-08 8:35 pm
回答 (1)
2012-02-08 9:57 pm
✔ 最佳答案
Problem 3: The answer is C(9,2) = 9 * 8 / 2 = 36Problem 4: The answer is C(9,1) * C(8,2) = 9 * (8 * 7) / 2 = 252
收錄日期: 2021-04-26 19:18:22
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https://hk.answers.yahoo.com/question/index?qid=20120208000051KK00257