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A certain band will perform 15 different songs in random order, and no song will be performed twice. If 9 of the songs are new, what is the probability that the first 2 songs that the band performs will both be new?
Give your answer as a fraction.
Give your answer as a fraction.
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· 相关考点
6.4.1 古典概率
6.4.1 古典概率
以上解析由 考满分老师提供。
