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Jul 15, 2020 Replied to a topic by WinG › 问与答 › 挑战概率题：冰箱 1 有 30 瓶可乐，冰箱 2 里有 31 瓶， 60 天随机拿走 1 瓶.. |
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60 天内只拿了 1 瓶
60 天内只拿了 1 瓶
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