1 . 一个电路如图所示,A,B,C为3个开关,其闭合的概率均为
,且是相互独立的,则灯亮的概率是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/3d9877d3-820b-423c-afc5-e29289edc320.png?resizew=179)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/3d9877d3-820b-423c-afc5-e29289edc320.png?resizew=179)
A.![]() | B.![]() | C.![]() | D.![]() |
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2022-07-09更新
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493次组卷
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2卷引用:安徽省池州市2021-2022学年高一下学期期末数学试题