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REENA'S MOVIE COLLECTION
The table above shows the number of movies in each genre in Reena's movie collection. If two different movies are to be selected at random from the collection. what is the probability that neither movie will be in the science fiction genre?
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当前版本由 354261qil 更新于2024-07-04 17:47:53 感谢由 354261qil 对此题目的解答所做出的贡献。
1-[C(12,2)+C(38,1)C(12,1)]/ C(50,2) = 703/1225
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C(38,2)/C(50,2) = 703/1225 也就是从50个中选2个，但不能选science fiction的情况
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