probability問題數學高手請幫忙

egnishsieh · 发表于 2013-5-27 13:46:06

我對機率完全不記得且沒印象
作業弄了半天都搞得頭昏了
可以幫下我嗎

In a survey of 500 married couple with at least one spouse employed, 300 of the families owned two or more cars. In 75% of the cases where more than one car was owned, both husband and wife were employed. In half the families, both spouses were employed. Give the probability table for this problem.

ShirleyR妤 · 发表于 2013-5-27 13:54:35

table要描述哪几样？

egnishsieh · 发表于 2013-5-27 14:02:34

ShirleyR妤发表于 2013-5-27 12:54
table要描述哪几样？

應該就是按照上述的描述回答
可是我設了老半天，都是會把機率給超過500

ShirleyR妤 · 发表于 2013-5-27 14:05:54

egnishsieh 发表于 2013-5-27 13:02
應該就是按照上述的描述回答
可是我設了老半天，都是會把機率給超過500

我不知道题目到底要你table要写哪几样东西

egnishsieh · 发表于 2013-5-27 14:08:28

ShirleyR妤发表于 2013-5-27 13:05
我不知道题目到底要你table要写哪几样东西

我想應該是 married couples with one spouse working or both working
和 families with 2 or more cars and more than one cars 吧

迟暮归舟 · 发表于 2013-5-27 14:10:45

...加油

小婧子yuan · 发表于 2013-5-27 16:14:17

egnishsieh · 发表于 2013-5-27 16:32:22

XSL 发表于 2013-5-27 14:05
both husband and wife were employed only one employed
less than 2 cars ...

可是加起來不到500人啊！

egnishsieh · 发表于 2013-5-27 16:48:28

XSL 发表于 2013-5-27 15:35
四個數字加起來不是正好500嗎？？

是兩邊的加起來都剛好要等於500才對

egnishsieh · 发表于 2013-5-27 17:05:15

XSL 发表于 2013-5-27 16:01
一共有四種情況。。。。

對不起，我剛才眼盲了。。。我真的十分感激你的無敵耐心。。。

egnishsieh · 发表于 2013-5-27 17:13:55

XSL 发表于 2013-5-27 16:09
那以後找我買機票哈哈哈

今年已經幫我弟買好了，下次一定。。。
你只賣國際的還是美國的也有呢？

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