随机变量
,若
,则
的值为
![](https://img.xkw.com/dksih/QBM/2016/8/8/1572968822087680/1572968827904000/STEM/17dab3013de146b697d7d2af01b88c8d.png)
![](https://img.xkw.com/dksih/QBM/2016/8/8/1572968822087680/1572968827904000/STEM/eef740bdd6ec41bf8dd55379834e05da.png)
![](https://img.xkw.com/dksih/QBM/2016/8/8/1572968822087680/1572968827904000/STEM/7e8df593dd2e49f6b31c94556c454fcf.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2016-12-04 18:36:11
|
【知识点】 概率
相似题推荐
单选题
|
较易
(0.85)
【推荐1】设
,
,
是一个随机试验中的三个事件,且
,
,
,给出下列结论:
①若
与
互斥,则
;
②若
与
独立,则
;
③若
,
,
两两独立,则
;
④若
,则
,
,
两两独立.
则其中正确结论的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b2a3318f82fec39c53c0e4fea00f75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9561f0ed50a5e48d8642cc51264a4ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04fd8604f2bd264318b8eeba47355a6a.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb9e9553dd7b47073cd4877f59d9331.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8af59dc7d5128c304e8a05606cae1bb.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/578909a9904634ca685d6701c20a802c.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/578909a9904634ca685d6701c20a802c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
则其中正确结论的个数为( )
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
单选题
|
较易
(0.85)
解题方法
【推荐2】已知集合
,
,在区间
上任取一实数x,则
的概率为
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573008277831680/1573008283164672/STEM/5c99c8bb82894d309dcca1ce82d56818.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573008277831680/1573008283164672/STEM/3641f0ba890545a1a3ff22b7b5c9f462.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573008277831680/1573008283164672/STEM/a3ce1fbf55a0481887b47e12d5b08b36.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573008277831680/1573008283164672/STEM/89c66b4d90794b84be5a4b01204542b1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次