Problem 1: Six schools are going to send their basketball teams to a tournament at which each team must play each other team exactly once. How many games are required?
Problem 2: In how many ways can a nine-person club select a president and a secretary-treasurer from among its members?
probability questions 1,2
2012-02-08 8:35 pm
回答 (1)
2012-02-08 9:54 pm
✔ 最佳答案
Problem 1 : The answer is C(6,2) = 6 * 5 /2 = 15Problem 2 : The answer is P(9,2) = 9 * 8 = 72
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https://hk.answers.yahoo.com/question/index?qid=20120208000051KK00256