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(理)若随机变量的分布列如下表,则Eξ的值为( ) ξ 1 2 3 4 5 P...
(理)若随机变量的分布列如下表,则Eξ的值为( )
A.
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B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225403913972585/SYS201311012254039139725008_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225403913972585/SYS201311012254039139725008_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225403913972585/SYS201311012254039139725008_ST/3.png)
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