在
根纤维中,有
根的长度超过
,从中任取一根,取到长度超过
的纤维的概率是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b72ac611ae66b86761e080761d9aabc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da45c443af7994a26ffa9d8894e7262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9e628bf38181699e1e39954d7ea6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9e628bf38181699e1e39954d7ea6586.png)
A.![]() | B.![]() | C.![]() | D.以上都不对 |
10-11高二·河北张家口·单元测试 查看更多[2]
更新时间:2016-11-30 18:30:59
|
【知识点】 几何概型
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【推荐1】在区间[0,π]上随机地取两个数x、y,则事件“y≤sinx”发生的概率为( )
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【推荐2】已知正方形
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A.![]() | B.![]() | C.![]() | D.![]() |
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