试题与答案

一个盒子里装有4张大小形状完全相同的卡片,分别标有数2,3,4,5;另一个盒子也

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题目:

一个盒子里装有4张大小形状完全相同的卡片,分别标有数2,3,4,5;另一个盒子也装有4张大小形状完全相同的卡片,分别标有数3,4,5,6,现从一个盒子中任取一张卡片,其上面的数记为x;再从另一盒子里任取一张卡片,其上面的数记为y,记随机变量η=x+y,求η的分布列和数学期望。

答案:

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1-5      BCABB

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