tt24-12

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During a 10-week summer vacation, was the average (arithmetic mean) number of books that Carolyn read per week greater than the average number of books that Jacob read per week?

(1)   Twice the average number of books that Carolyn read per week was greater than 5 less than twice the average number of books that Jacob read per week.

(2)   During the last 5 weeks of the vacation, Carolyn read a total of 3 books more than Jacob.

条件1说的是啥呀,半天没看懂.汗的

(1) Twice the average number of books that Carolyn read per week was greater than 5
        <comma> less than twice the average number of books that Jacob read per week.

加个逗句后好理解了吧~~

哦,那这个题应该是这样的了

设Carolyn每周平均读x本书,Jacob每周读y本书

那么2x大于5

2x小于２y

MM,做GWD题有疑问时，可先用搜索功能，很多题目前人已提过并有解决方法；如果真的搜索不到，再发贴上来问。

方法：如果GWD第24套Q12，则搜索的关键词：24-12

我刚才搜了一下，有挺多的，你先看看，不明再问，好么？

成．我去搜索下，其实我先开始看了taotao和gigi的讨论版木有看到

所以再这里发了个贴子

给你带来不方便了，见谅

以下是引用colorful_na在2007-7-4 21:18:00的发言：

成．我去搜索下，其实我先开始看了taotao和gigi的讨论版木有看到

所以再这里发了个贴子

给你带来不方便了，见谅

你最后那句~~不是啦~~只是你自己先搜索下，这样会节约自己的时间，不用等别人的反应才解开心头一迷~~

看见你登录名旁有行如下的么？点击“搜索”那栏就行了