题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191917-94563.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191917-88703.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191917-32824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191917-69673.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191918-25023.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191918-47450.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191918-86340.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191918-86340.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191918-96474.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191919-56525.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191919-34429.png)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191919-27269.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191919-17143.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191919-27303.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191920-41142.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191920-23820.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191920-66083.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191920-12254.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191921-69631.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191921-55269.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191921-10755.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191921-97797.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191922-13967.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191922-81857.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191922-42955.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191922-32903.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191923-76899.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191923-63715.png)
(1)选取的这3个点与原点 恰好是正三棱锥的四个顶点的所有可能结果有
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191923-58601.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191923-14105.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191918-86340.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191919-56525.png)
(2)选取的这3个点与原点 共面的所有可能结果有:
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191919-17143.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191919-27303.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191920-41142.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191920-23820.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191920-12254.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191921-69631.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191921-55269.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191921-10755.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191922-13967.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191922-81857.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191922-42955.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191922-32903.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191918-86340.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191919-34429.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191905-54594.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191905-87806.png)
| 喜爱打羽毛球 | 不喜爱打羽毛球 | 合计 |
男生 | | 5 | |
女生 | 10 | | |
| | | 50 |
已知在全部50人中随机抽取1人抽到不喜爱打羽毛球的学生的概率
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191853-70621.png)
(1)请将上面的列联表补充完整;
(2)是否有99.5%的把握认为喜爱打羽毛球与性别有关?说明你的理由;
(3)已知喜爱打羽毛球的10位女生中,
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191853-30672.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191854-93840.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191854-15798.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191854-56588.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191854-89705.png)
![]() | 0.15 | 0.10 | 0.05 | 0.025 | 0.010 | 0.005 | 0.001 |
![]() | 2.072 | 2.706 | 3.841 | 5.024 | 6.635 | 7.879 | 10.828 |
(参考公式:
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191855-50300.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191855-45388.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191844-54237.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191844-54237.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191844-59009.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191844-59009.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191844-11022.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191844-71007.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191844-54237.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191844-41007.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191844-59009.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191845-60610.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191844-54237.png)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191845-86238.png)
(Ⅱ)设
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191845-86586.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026191845-60610.png)
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