問題詳情
擲一粒公正的骰子三次，令 A 表示至少有一次出現 5 點的事件，B 表示至少有一次出現 3 點的事件，則和事件的機 率 
=________
=________
參考答案
答案：D
難度：適中0.625
統計：A(8),B(2),C(11),D(50),E(0)
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