题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183917-78782.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183917-43138.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183917-44875.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183918-78806.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183918-52602.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
答案
解析
试题分析:从分别写有
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183919-22110.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183920-70057.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183920-40887.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183920-70296.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183920-48409.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183921-91952.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183921-14932.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183921-44969.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183921-87558.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183922-46190.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183922-17358.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183922-66703.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183922-18917.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183923-93737.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183923-48397.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183923-66555.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183924-53300.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183924-60275.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183924-54452.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183924-37865.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183925-58556.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183925-90636.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183925-16648.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183926-91694.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183926-35511.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183926-85455.png)
两张卡片上的数字之和为偶数的有:
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183921-14932.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183921-87558.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183922-66703.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183923-93737.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183924-53300.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183924-54452.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183925-90636.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183926-91694.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183926-44296.png)
∴从分别写有
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183919-22110.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183920-70057.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183920-40887.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183920-70296.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183920-48409.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183926-29104.png)
故选D.
核心考点
试题【从分别写有,,,,的五张卡片中任取两张,假设每张卡片被取到的概率相等,且每张卡片上只有一个数字,则取到的两张卡片上的数字之和为偶数的概率为( )A.B.C】;主要考察你对随机事件的概率等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183912-41557.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183912-57662.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183913-48383.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183906-28110.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183906-33599.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183907-55715.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183907-55715.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183907-12903.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183858-70378.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183858-34623.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183859-43652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183859-84467.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183859-41992.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026183852-91340.png)
(Ⅰ)若用表中数据所得频率代替概率,则处罚10元时与处罚20元时,行人会闯红灯的概率的差是多少?
(Ⅱ)若从这5种处罚金额中随机抽取2种不同的金额进行处罚,在两个路口进行试验.
求这两种金额之和不低于20元的概率;
②若用X表示这两种金额之和,求X的分布列和数学期望.
(Ⅰ)求应从水果类、点心类、小吃类中分别买回的种数;
(Ⅱ)若某游客从买回的6种特产中随机抽取2种送给自己的父母,
①列出所有可能的抽取结果;
②求抽取的2种特产均为小吃的概率.
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