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悠闲数学娱乐论坛(第3版)
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悠闲数学娱乐论坛(第3版)
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请教一道概率问题
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AK007
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Post time 2024-3-24 22:31
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Post time 2024-3-24 22:37
E(X)是10人组的检测次数的期望吗 还是每个个体的平均检测次数
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悠闲数学娱乐论坛(第3版)
2025-3-6 02:43 GMT+8
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