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1.試求丟一個公正骰子五次,恰好出現2個正面的機率﹖
問題詳情
1.試求丟一個公正骰子五次,恰好出現2個正面的機率﹖
參考答案
答案:B
難度:適中0.666667
統計:A(0),B(4),C(1),D(1),E(0)
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