名校
解题方法
1 . 某学习
的注册用户分散在
、
、
三个不同的学习群里,分别有
人、
人、
人,该
设置了一个名为“七人赛”的积分游戏,规则要求每局游戏从
、
、
三个学习群以分层抽样的方式,在线随机匹配学员共计
人参与游戏.
(1)每局“七人赛”游戏中,应从
、
、
三个学习群分别匹配多少人?
(2)设匹配的
名学员分别用:
、
、
、
、
、
、
表示,现从中随机抽取出
名学员参与新的游戏.
(ⅰ)试用所给字母列举出所有可能的抽取结果;
(ⅱ)设M为事件“抽取的
名学员不是来自同一个学习群”,求事件
发生的概率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d113b8bdc6afed580aaffe6bd0bec71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15017f1dd6d40c5188437370d7f66bc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15017f1dd6d40c5188437370d7f66bc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a93d998e2a08c66e4973ea520e7b5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d113b8bdc6afed580aaffe6bd0bec71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
(1)每局“七人赛”游戏中,应从
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设匹配的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77ab1256702aef4e9f1a5eb6c12ecc96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fbd67f60f04c278bdd867fdb3979dfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a34aea9f11eb0421ff2b6b576a4823d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1c27e0b2d15b25bdc9aec9e6069c730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38bed89dbb2d10bb4c322c581299d8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69fa6d94a6ae1eafab6c39492ab14e86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f628aac5df56f23a2656a61cb1b51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
(ⅰ)试用所给字母列举出所有可能的抽取结果;
(ⅱ)设M为事件“抽取的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
2023-05-07更新
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362次组卷
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3卷引用:贵州省贵阳市2023届高三适应性考试(二)数学(文)试题