咦？您是概率老師嗎？不認識沒聽說過部長。不過三枚都能擊中的概率是：34.3% ：-）

來源: 最西邊的島上於 2025-02-12 09:09:09 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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