已知随机变量
~
,那么![](https://staticzujuan.xkw.com/quesimg/Upload/formula/223770da09feb2fc824764188e924d7e.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01620e1ab73555de2d08c688fdecf238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/223770da09feb2fc824764188e924d7e.png)
更新时间:2022-05-14 17:17:18
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填空题-双空题
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较易
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名校
解题方法
【推荐1】小明的投篮命中率为
,各次投篮命中与否相互独立.他连续投篮三次,设随机变量X表示三次投篮命中的次数,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dad974b973a805143570e82907c440a.png)
___________ ;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/223770da09feb2fc824764188e924d7e.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dad974b973a805143570e82907c440a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/223770da09feb2fc824764188e924d7e.png)
您最近一年使用:0次
填空题-单空题
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较易
(0.85)
名校
解题方法
【推荐2】已知随机变量X,Y满足,
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/626ccf5514f7272d78cc964e8f87a21b.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d70012f3c462d4911bf6cbdc0e6b119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48593999072abe3c48509ea018f77e3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/626ccf5514f7272d78cc964e8f87a21b.png)
您最近一年使用:0次