题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184320-61130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184320-76732.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184321-46816.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184321-25730.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184321-46816.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184321-46816.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184321-68895.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184321-88179.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184322-12575.png)
①
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184322-35890.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184322-12575.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184322-98061.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184322-85160.png)
④
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184323-81189.png)
⑤
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184323-45569.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184323-81189.png)
答案
解析
试题分析:根据题意,由于先从甲罐中随机取出一球放入乙罐,分别以
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184321-68895.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184321-88179.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184322-12575.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184322-35890.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184322-12575.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184322-98061.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184322-85160.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184323-81189.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184323-45569.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184323-81189.png)
点评:主要是考查了古典概型概率的计算,属于基础题。
核心考点
试题【甲罐中有个红球,个白球和个黑球,乙罐中有个红球,个白球和个黑球。先从甲罐中随机取出一球放入乙罐,分别以和表示由甲罐取出的球是红球,白球和黑球的事件;再从乙罐中随】;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/20191026/20191026184316-86472.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184316-60575.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184316-74264.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184317-71840.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184317-22306.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184317-50191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184317-71840.png)
(1)求中三等奖的概率;
(2)求中奖的概率。
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184308-95824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184308-94401.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184308-95824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184309-33687.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184309-17024.png)
(Ⅰ)求随机变量
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184309-17024.png)
(Ⅱ)用
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184309-72074.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184308-95824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184310-84062.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184310-23556.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184259-25694.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184259-81689.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184300-63065.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184300-48474.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184300-48474.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184300-56222.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184300-33715.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184259-25694.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184301-26274.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184301-26274.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184301-37599.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184259-25694.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184300-63065.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184301-93418.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184300-48474.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184301-26274.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184301-37599.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184259-25694.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184300-56222.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184301-36063.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184302-83858.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184302-62886.png)
(1)写出
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184302-32817.png)
(2)实施哪种方案,两年后出口额超过危机前出口额的概率更大?
(3)不管哪种方案,如果实施两年后出口额达不到、恰好达到、超过危机前出口额,预计利润分别为
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184302-17895.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184303-41635.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184303-25142.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026184252-81965.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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