国际顶尖MBA申请交流平台--TOPWAY MBA

标题: GWD 3-34 math [打印本页]

作者: chenholan 时间: 2009-8-13 22:40 标题: GWD 3-34 math

A certain company that sells only cars and trucks reported that revenues from car sales in 1997 were down 11 percent from 1996 and revenues from truck sales in 1997 were up 7 percent from 1996. If total revenues from car sales and truck sales in 1997 were up 1 percent from 1996, what is the ratio of revenue from car sales in 1996 to revenue from truck sales in 1996?

A. 1 : 2

B. 4 : 5

C. 1 : 1

D. 3 : 2

E. 5 : 3

请教答案如何计算

作者: JJJooe 时间: 2009-8-14 14:01

你分别设两个未知数不久一下子解出来了

答案是1：2

数学还没复习好怎么就做GWD了...设96年汽车销售额为x，卡车销售额为y

则97年分别为0.89x和1.07y

根据题意可得

（0.89x+1.07y）/（x+y）=1.01

算出来y=2x

欢迎光临国际顶尖MBA申请交流平台--TOPWAY MBA (http://forum.topway.org/)