已知随机变量
,其中
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87837df05bd5b89263faa7778cf4deea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c11f6c800b8e0410674a0c6d307d26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/796af1341f61bd74b3f87cea51976b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60176522fe861b4fffaa3ed3e37c4d58.png)
A.![]() | B.![]() | C.![]() | D.![]() |
2024高三·全国·专题练习 查看更多[3]
更新时间:2024-05-30 19:18:33
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单选题
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较易
(0.85)
【推荐1】计算机程序每运行一次都随机出现一个五位的二进制数
,其中A的各位数字中,
,
出现0的概率为
,出现1的概率为
.记
,当程序运行一次时,
的概率为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78aea89d3ea1359b6988b6c79ef4dde0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e7bec888e2d14dc5720d45653d440f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac7a3e8ec4d2e66105ebf38a72fbd86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc77a2b6615b063c3fddf32ed3218ae3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐2】电子手表厂生产某批电子手表正品率为
,次品率为
,现对该批电子手表进行测试,设第
次首次测到正品,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14e63e32065781cedcf4be329a101b98.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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解题方法
【推荐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)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
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较易
(0.85)
【推荐2】同时抛掷三枚硬币,则抛掷一次时出现两枚正面一枚反面的概率为
A.![]() | B.![]() | C.![]() | D.![]() |
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