名校
1 . 设离散型随机变量
的分布列为:
![](https://img.xkw.com/dksih/QBM/2017/6/4/1701754093985792/1702503647641600/STEM/7e0862a30a644296b0e9a219ba359b93.png?resizew=291)
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0d99fef1aa4dbcc6dc7b30b7d2c9a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://img.xkw.com/dksih/QBM/2017/6/4/1701754093985792/1702503647641600/STEM/7e0862a30a644296b0e9a219ba359b93.png?resizew=291)
则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0d99fef1aa4dbcc6dc7b30b7d2c9a9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-06-05更新
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1326次组卷
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2卷引用:安徽省太和中学2016-2017学年高二下学期第三次月考数学(理)试题