请教GWD

cxks01 · 发表于 2011-8-23 16:51:46

1
A total of $60,000 was invested for one year.But of this amount earned simple annual interest at the rate of x percent per year, and the rest earned simple annual interest at the rate of y percent per year.If the total interest earned by the $60,000 for that year was $4,080, what is the value of x?
(1)x = (3/4) y
(2)The ratio of the amount that earned interest at the rate of x percent per year to the amount that earned interest at the rate of y percent per year was 3 to 2.

2
What is the median number of employees assigned per project for the projects at Company Z?
(1)25 percent of the projects at Company Z have 4 or more employees assigned to each project.
(2) 35 percent of the projects at Company Z have 2 or fewer employees assigned to each project.

第1题读不太懂题目，X,Y两种利润有什么不同？第2题为什么中位数是3？

anyunww · 发表于 2011-8-23 17:01:06

第一题是指总共用60000来投资，一部分的钱a用于投资收益为X的项目，剩下的钱b用于投资收益为Y的项目,则公式可为ax+bY=4080,a+b=60000,(2)的式子为ax/(bY)=3/2
这个不知道你看不看的懂了~~

anyunww · 发表于 2011-8-23 17:07:10

第二题，35%的项目<=2, 25%>=4,那么剩下的40%肯定是3了~~而中位数就在那40%中

请教GWD

所属分类: GMAT考试

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