求解一道PREP的数学题！！！

lc2834065 · 发表于 2012-4-28 13:50:48

175.Before being simplified, the instructions for computing income tax in Country R were to add 2 percent of one's annual income to the average (arithmetic mean) of 100 units of Country R's currency and 1 percent of one's annual income. Which of the following represents the simplified formula for computing the income tax, in Country R's currency, for a person in that country whose annual income is I ? 题目看的不是很懂，正确答案是50+40分之I，我做PREP遇到的，不会~~~~~PREP破解也没有有讲解。

yongsf · 发表于 2012-4-28 22:20:08

楼主可以自己搜索一下阿　很多人问过这题了

给两个不错的解释的链接
http://forum.chasedream.com/GMAT_Math/thread-676817-1-1.html?postid=16019882&searchmode=TopicContent&searchtext=Before%20being%20simplifie

http://forum.chasedream.com/GMAT_Math/thread-708392-1-1.html?postid=16275492&searchmode=TopicContent&searchtext=Before%20being%20simplifie

lc2834065 · 发表于 2012-4-28 23:33:16

感谢yongsf ，懂了，搜索功能不是很会用，正在尝试~~~~~

求解一道PREP的数学题！！！

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