YeTianYa
幼苗
共回答了23个问题采纳率:95.7% 举报
(本题满分
![](https://img.yulucn.com/upload/0/c1/0c1ca1bdd6f6baa84870a4a4a83e028a_thumb.jpg)
分)袋中有质地、大小完全相同的
![](https://img.yulucn.com/upload/4/58/458ae451e2640a255a98142428652971_thumb.jpg)
个球,编号分别为
![](https://img.yulucn.com/upload/c/29/c2960ef6be29ab2ba3cba231cc5a0268_thumb.jpg)
、
![](https://img.yulucn.com/upload/3/92/3929cb0327e7c83717098e5e137e76ad_thumb.jpg)
、
![](https://img.yulucn.com/upload/6/de/6de416c7784b359f8c45c50ed82138e9_thumb.jpg)
、
![](https://img.yulucn.com/upload/0/b0/0b0f0f4e4fca4bbd5961b9b1aec41778_thumb.jpg)
、
![](https://img.yulucn.com/upload/4/58/458ae451e2640a255a98142428652971_thumb.jpg)
,甲、乙两人玩一种游戏:甲先摸出一个球,记下编号,放回后乙再摸一个球,记下编号,如果两个编号的和为偶数算甲赢,否则算乙赢。
(1) 求两个编号的和为6的概率;
(2)求甲赢的事件发生的概率.
(1)
(2)
解(1)记“编号的和为
![](https://img.yulucn.com/upload/b/28/b28064b7936200c30de931935fef134c_thumb.jpg)
”的事件
![](https://img.yulucn.com/upload/0/2b/02b4d622b5af3d47613b808ff20d2cb0_thumb.jpg)
,事件
![](https://img.yulucn.com/upload/0/2b/02b4d622b5af3d47613b808ff20d2cb0_thumb.jpg)
所包含的基本事件为
![](https://img.yulucn.com/upload/4/d8/4d863dbf4d6312836c9cfb96bda4fc72_thumb.jpg)
、
![](https://img.yulucn.com/upload/8/3c/83c481b5e1e528103fc0b4d1e4bcc2bf_thumb.jpg)
、
![](https://img.yulucn.com/upload/9/92/992796cede7294550baba557ef31cbd3_thumb.jpg)
、
![](https://img.yulucn.com/upload/2/ad/2ad2961e543910d922e8a87515fa71a3_thumb.jpg)
、
![](https://img.yulucn.com/upload/b/a7/ba745192fa9d6f8cf2a821560d2646ef_thumb.jpg)
,共5个,
∴
![](https://img.yulucn.com/upload/d/8a/d8a7c0577c5b399dbb873b59c4bbfd31_thumb.jpg)
6分
(2)记“甲赢”为事件
![](https://img.yulucn.com/upload/6/4f/64f8ca2988da2a018c62f6f6f5a26935_thumb.jpg)
,事件
![](https://img.yulucn.com/upload/6/4f/64f8ca2988da2a018c62f6f6f5a26935_thumb.jpg)
所包含的基本事件为
![](https://img.yulucn.com/upload/9/4e/94e51e9372eddaaef4f8aa232cc658d3_thumb.jpg)
、
![](https://img.yulucn.com/upload/d/ac/dace546061c655e19a1144f33f0944c7_thumb.jpg)
、
![](https://img.yulucn.com/upload/4/d8/4d863dbf4d6312836c9cfb96bda4fc72_thumb.jpg)
、
![](https://img.yulucn.com/upload/a/9d/a9d1b545dd6a3cbd3498ff09dfa24459_thumb.jpg)
、
![](https://img.yulucn.com/upload/8/3c/83c481b5e1e528103fc0b4d1e4bcc2bf_thumb.jpg)
、
![](https://img.yulucn.com/upload/6/06/6067bc5b6080f9ac0cb3ba726ca21233_thumb.jpg)
、
![](https://img.yulucn.com/upload/9/92/992796cede7294550baba557ef31cbd3_thumb.jpg)
、
![](https://img.yulucn.com/upload/b/30/b30cfe74f6602b4ef828050f8c022e8d_thumb.jpg)
、
![](https://img.yulucn.com/upload/2/ad/2ad2961e543910d922e8a87515fa71a3_thumb.jpg)
、
![](https://img.yulucn.com/upload/5/f9/5f9a83f0db10ffc6da7cfb6ebb239656_thumb.jpg)
、
![](https://img.yulucn.com/upload/b/a7/ba745192fa9d6f8cf2a821560d2646ef_thumb.jpg)
、
![](https://img.yulucn.com/upload/a/4d/a4d638b97f95d7d75687651c8f3159b4_thumb.jpg)
、
![](https://img.yulucn.com/upload/2/1a/21abd3367f370590773982e3df73d9d7_thumb.jpg)
,共13个,
∴
![](https://img.yulucn.com/upload/e/7a/e7a6236793f7d2f19571b0525960aad1_thumb.jpg)
,
![](https://img.yulucn.com/upload/d/8a/d8a7c0577c5b399dbb873b59c4bbfd31_thumb.jpg)
12分
1年前
8