講真，如果你每次隻挑選當第二個球是白色時，然後記錄下第三個球是黑色或者是白色的幾率，肯定是五十：五十，一半

來源: 金筆於 2024-02-21 14:10:49 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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