讲真，如果你每次只挑选当第二个球是白色时，然后记录下第三个球是黑色或者是白色的几率，肯定是五十：五十，一半

来源: 金笔于 2024-02-21 14:10:49 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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