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A bag contains 5 quarters, 10 nickels, and 15 dimes. If 4 of these coins are to be picked at random from the bag, without replacement, what is the probability of getting 4 quarters?
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· 相关考点
6.4.4 条件概率
6.4.4 条件概率
以上解析由 考满分老师提供。
