设随机变量ξ的分布列由p(ξ=k)=a(13)k,k=1,2,3,则a的值为()A.1B.913C.1113D.2713-高二数学

题目简介

设随机变量ξ的分布列由p(ξ=k)=a(13)k,k=1,2,3,则a的值为()A.1B.913C.1113D.2713-高二数学

题目详情

设随机变量ξ的分布列由http://www.mofangge.com/html/qDetail/02/g2/201406/data:image/png;base64,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,则a的值为(  )
A.1B. C. D.
题型:单选题难度:中档来源:不详

答案

D

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