你觉得第一个是白球以后，两个袋子的概率一样，但实际上两个白球的袋子的概率是一白一黑袋子的概率的两倍

来源: tibuko 于 2020-05-19 11:44:27 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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