1 . 一批排球中正品有
个,次品有
个,
,从这批排球中每次随机取一个,有放回地抽取10次,
表示抽到的次品个数.若
,从这批排球中随机抽取两个,则至少有一个正品的概率![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb46b3572701f4b35b01ef6d759ac945.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ded2a280356df7cc55e8342d74680d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2019-01-11更新
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3卷引用:河北省承德市2019届高三上学期期末数学(理)试题