GWD 3-34

[cuteone]

Q34.
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

the answer is A....

一向對這種%題很頭大...
請問有人有好的解法嗎?? :(

[micht]

[tab][tab][tab]1996 1997
Truck[tab]x[tab][tab]0.89x
Car[tab][tab][tab]y[tab]1.07y

Revenue
1997=0.89x+1.07y
1996=x+y

0.89x+1.07y=1.01(x+y)
x/y=0.06/0.12
x/y=1/2
x:y =1:2

[cuteone]

原來原來...

看你的解法就清楚多了
(Y) THX~~~

[gimmy03]

對不起 請問一下
因為題目是問車子的銷售比上卡車的銷售
誠如樓'上的解法
是否為 Y/X =2/1=2:1 呢?

Please help! 3Q~

[gimmy03]

Could any one help this question?

[szyang]

[tab][tab][tab]1996 1997
Truck....應該是car[tab]x[tab][tab]0.89x
Car..應該是Truck[tab][tab][tab]y[tab]1.07y

只是這2個寫反了歐....所以gimmy03才會有這樣的疑惑...再記得仔細看一遍歐...

Revenue
1997=0.89x+1.07y
1996=x+y

0.89x+1.07y=1.01(x+y)
x/y=0.06/0.12
x/y=1/2
x:y =1:2