問題詳情
4. 投擲硬幣三枚，若三枚均出現同一面，則可得一分，否則得零分。今連投五次，若機會均等且假設每次投幣互不影響，則：
(１)恰得三分之機率為_________
(１)恰得三分之機率為_________
參考答案
答案：D
難度：適中0.537761
統計：A(376),B(344),C(498),D(1417),E(0)
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