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頁次:1/1 每頁50條記錄, 本頁顯示1 到5, 共5 分頁: [1] | |
• #跟帖# ????概率專業的,不過被你這麽一說不敢保證了 [品茶小軒] - 畫皮(0 bytes ) 2021-10-02 | |
• #跟帖# 3個e是4*4=16 [品茶小軒] - 畫皮(0 bytes ) 2021-10-02 | |
• #跟帖# 問號那裏應該是除號 [品茶小軒] - 畫皮(0 bytes ) 2021-10-02 | |
• #跟帖# 先取四個再排列:分為0個e,排列24;1個e,排列4*24;2個e,c2/4*p4/4?2=72;3個e,c1/4*p1/4=1 [品茶小軒] - 畫皮(0 bytes ) 2021-10-02 | |
• #跟帖# 這是對的 [品茶小軒] - 畫皮(0 bytes ) 2021-10-02 | |
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