设随机变量X的分布列为P(X=k)=k15,k=1,2,3,4,5,则P(12<X<52)等于()A.215B.25C.15D.115-数学

题目简介

设随机变量X的分布列为P(X=k)=k15,k=1,2,3,4,5,则P(12<X<52)等于()A.215B.25C.15D.115-数学

题目详情

设随机变量X的分布列为http://www.mofangge.com/html/qDetail/02/g0/201312/data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEoAAAAkCAYAAAAuLqxbAAABAElEQVRoge2XQQrFIAxEe4y/VO9/r3+MdlUQUTNRq1HmgZsiNRknaq6LEEIIsU4I4Q4h3Kvj2AIKBUKhQF6h3jKkcAViYShShdhRq2MxDUsOhKUHkLppmrO+XuSIHZ+VhEmxYmtKtkxrPWdpKUl0jjaPKaSB5QJFvqEJIvNMitUqVPy95Lac01qEkv45hdFCoevVEm4RwXv/7x1i4NIuoWcXAuKuFqGcc7/eAQeundNTehrxTZaeZk5r6WluWDO03lYjbr1R59PnaGw88h1VaylMCqVltxam5NilZ50lRj89jodCgSCltyIuc4zsUY9m2wZ8NnQUCIUSkN5KPMzJWh7T7xCYCE6gvgAAAABJRU5ErkJggg==,k=1,2,3,4,5,则Phttp://www.mofangge.com/html/qDetail/02/g0/201312/data:image/png;base64,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等于(  )
A.B.C.D.
题型:单选题难度:中档来源:不详

答案

C

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