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There are 10 balls in a box, among which are 4 blue balls and 6 red balls. Randomly select three balls from them, what's the probability that all the three balls are blue?
Give your answer as a fraction.
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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。
