1 . 已知空间直角坐标系中的四个点
,经过
四点的球记作球M.从球M内部任取一点P,则点P落在三棱锥
内部的概率是___
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce2ae912819c9742a3e5080325b479b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c6d16dae51c29aea621c953be852e5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba6fb5afc7fd86226985c0bd5e53b70.png)
您最近一年使用:0次
2 . 如图,面积为
的正方形
中有一个不规则的图形
,可按下面方法估计
的面积:在正方形
中随机投掷
个点,若
个点中有
个点落入
中,则
的面积的估计值为
,假设正方形
的边长为
,
的面积为
,并向正方形
中随机投掷
个点,用以上方法估计
的面积时,
的面积的估计值与实际值之差在区间
内的概率为
附表:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/453027c52c9a85a27c8da81a35f01278.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/24/1d73b2c5-2420-4413-8417-2c44ec156ab3.png?resizew=164)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1380ed29973304fbbcab50f6f3c7bb6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1926eb08a21a8b6558fcfd4c52a4a23b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73f79cbe186020a8ab175e5ae34964e1.png)
附表:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/453027c52c9a85a27c8da81a35f01278.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/24/1d73b2c5-2420-4413-8417-2c44ec156ab3.png?resizew=164)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2018-03-07更新
|
442次组卷
|
2卷引用:山西省晋中市2018届高三1月高考适应性调研考试数学(理)试题
10-11高二下·海南·期末
3 . 通过随机询问110名性别不同的中学生是否爱好运动,得到如下的列联表:
由
得,![](https://img.xkw.com/dksih/QBM/2017/7/14/1730021190385664/1730818711871488/STEM/cdf51b66775e422498f4e8914acf5515.png?resizew=227)
参照附表,得到的正确结论是
男 | 女 | 总计 | |
爱好 | 40 | 20 | 60 |
不爱好 | 20 | 30 | 50 |
总计 | 60 | 50 | 110 |
由
![](https://img.xkw.com/dksih/QBM/2017/7/14/1730021190385664/1730818711871488/STEM/cdc8cb3db419464b86c2bfecb9c05155.png?resizew=212)
![](https://img.xkw.com/dksih/QBM/2017/7/14/1730021190385664/1730818711871488/STEM/cdf51b66775e422498f4e8914acf5515.png?resizew=227)
0.050 | 0.010 | 0.001 | |
3.841 | 6.635 | 10.828 |
参照附表,得到的正确结论是
A.在犯错误的概率不超过0.001的前提下,认为“爱好运动与性别有关” |
B.在犯错误的概率不超过0.01的前提下,认为 “爱好运动与性别有关” |
C.在犯错误的概率不超过0.001的前提下,认为“爱好运动与性别无关” |
D.有![]() |
您最近一年使用:0次
2011-07-16更新
|
1283次组卷
|
10卷引用:2015-2016学年山西省康杰中学高二下期末理科数学试卷
2015-2016学年山西省康杰中学高二下期末理科数学试卷(已下线)2010-2011学年海南省嘉积中学高二下学期教学质量检测(三)数学(理)2015届广东省汕头市潮南区高三5月高考模拟理科数学试卷2014-2015学年广东省揭阳市一中高二下学期第二次段考理科数学试卷2014-2015学年广东省珠海市高二下学期期末考试理科数学试卷2015-2016学年广西宾阳中学高二3月月考文科数学试卷2015-2016学年江西省南昌市三中高二理下学期期末考试数学试卷湖南省邵东三中2016-2017学年高二下学期期中考试理数试题湖北省天门市三校2016-2017学年高二下学期期中考试数学(文)试题【全国市级联考】湖北省黄冈市2017-2018高二期末考试数学(文科)试题