2010高二·湖南·学业考试
解题方法
1 . 已知随机变量
服从二项分布,
,则
的值为
![](https://img.xkw.com/dksih/QBM/2010/6/4/1569754888331264/1569754893025280/STEM/d47a7dbc45ea4c0fb6bfe67830149d70.png)
![](https://img.xkw.com/dksih/QBM/2010/6/4/1569754888331264/1569754893025280/STEM/7bb8b736b02d462f867a17eca6d4a972.png)
![](https://img.xkw.com/dksih/QBM/2010/6/4/1569754888331264/1569754893025280/STEM/c5f87a4df6f14f3a8fd1fc6609849d15.png)
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A.![]() | B.![]() | C.![]() | D.![]() |