問題詳情
20 給定一個離散隨機變數（discrete random variable）X，它的機率質量函數（probability mass function）為 
則 K 之值為何？
(A)1/2
(B)2/3
(C)3/4
(D)2
則 K 之值為何？(A)1/2
(B)2/3
(C)3/4
(D)2
參考答案
答案：A
難度：非常困難0
統計：A(0),B(0),C(0),D(0),E(0)
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