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Joined: 06 Oct 2004
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16 Mar 2005, 19:21
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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

Pls explain!!!1
VP
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16 Mar 2005, 19:56
"A"...1:2

If X and Y were numbers in 1996 for car and truck, then in 1997 they wud be 0.89X and 1.07Y

Also given total was 1 % more in 1997 so

(X+Y)1.01 = 0.89X + 1.07Y

101(R+1) = 89R+107

R = 1/2
VP
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18 Mar 2005, 06:35
1996=> x+y => revenue cars and trucks
1997=> 0,89x+1,07y=1,01(x+y)=>0,06y=0,12x=>0,06/0,12=x/y=>1/2=x/y
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