23-24高二下·江苏·期末
解题方法
1 . 已知随机变量X的分布列为则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
________ ;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/981a1cde2aefb846d30f461a39a1d062.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/981a1cde2aefb846d30f461a39a1d062.png)
X | 0 | 10 | 100 |
P | 0.81 | ![]() | 0.09 |
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解题方法
2 . 已知随机变量
的取值为
,若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c56d3c6256e17c9d4bbc44b2cfe8ae94.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bce9f696b2e58dbdf5e89f1b35e30b89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0f3980df4df293308601b6a1895d78b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/006c079866a96892cf86597b47afad44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c56d3c6256e17c9d4bbc44b2cfe8ae94.png)
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7日内更新
|
555次组卷
|
3卷引用:专题04 随机变量的均值与方差综合--高二期末考点大串讲(人教B版2019选择性必修第二册)
(已下线)专题04 随机变量的均值与方差综合--高二期末考点大串讲(人教B版2019选择性必修第二册)浙江省湖州中学2023-2024学年高二下学期第二次阶段性测试数学试题广东省深圳市福田区红岭中学2023-2024学年高二下学期期中考试数学试卷
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3 . 随机变量
的取值为0,1,2,分布列如图:若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1c0f363e40a7bcb1a705f74bf08e871.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/006c079866a96892cf86597b47afad44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1c0f363e40a7bcb1a705f74bf08e871.png)
![]() | 0 | 1 | 2 |
![]() | ![]() | ![]() | ![]() |
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4 . 已知随机变量
的概率分布为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/010924a0a60b9b270f82b8becc33a771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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5 . 已知随机变量
的分布列如下:
若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
______ ;当![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
______ 时,
最大.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![]() | 0 | 1 | 2 |
![]() | ![]() | 0.6 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/467bf9f6b91ee1f6cfbe3ac944403f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90a0722562d03a0a55a6c63e5d4cc338.png)
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6 . 随机变量
的分布列如表所示,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75c307c420a3546176fbe7fc250252b2.png)
______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42131f7575ef4427a382774db88d144e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75c307c420a3546176fbe7fc250252b2.png)
0 | 1 | 2 | 3 | |
0.1 | 0.1 |
您最近一年使用:0次
2024-05-03更新
|
438次组卷
|
4卷引用:7.3 离散型随机变量的数字特征(6大题型)精讲-2023-2024学年高二数学题型分类归纳讲与练(人教A版2019选择性必修第三册)
(已下线)7.3 离散型随机变量的数字特征(6大题型)精讲-2023-2024学年高二数学题型分类归纳讲与练(人教A版2019选择性必修第三册)(已下线)核心考点6 离散型随机变量与分布列 A基础卷 (高二期末考试必考的10大核心考点)陕西省咸阳市实验中学2023-2024学年高二下学期第二次月考数学试卷(已下线)专题04 高二下期末考前必刷卷02(提高卷)--高二期末考点大串讲(人教A版2019)
7 . 某一射手射击所得的环数
的分布列如表:
记“函数
在区间
上单调递增”为事件A,则事件A的概率是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
4 | 5 | 6 | 7 | 8 | 9 | 10 | |
![]() | 0.02 | 0.04 | 0.06 | 0.09 | 0.28 | 0.29 | 0.22 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc399139750808d3d4f9ac8646f1df18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394231525fb547a02150950396d21a50.png)
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2024高三·全国·专题练习
名校
解题方法
8 . 已知离散型随机变量
的分布列为:
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316b8a8b3393aee40f69b5b292e90ce4.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![]() | 1 | 2 | 3 |
![]() | ![]() | m | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316b8a8b3393aee40f69b5b292e90ce4.png)
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2024高三·全国·专题练习
解题方法
9 . 已知随机变量的分布列为P(X=k)=
,k=1,2,3,4,则D(2X-1)=________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
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解题方法
10 . 已知
,且
,记随机变量
为
,
,
中的最小值,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc23dc1709498e8920d7d243213190b2.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fcb57dd554abf84a268871f0de248e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbb603414e6b47ce46dbbcd3f955a424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc23dc1709498e8920d7d243213190b2.png)
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