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Among the 200 cars displayed at an auto show, 50 had built-i

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Senior Manager
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GMAT 1: 760 Q49 V44
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Kudos [?]: 119 [0], given: 12

Among the 200 cars displayed at an auto show, 50 had built-i [#permalink] New post 20 Aug 2009, 08:39
Among the 200 cars displayed at an auto show, 50 had built-in air conditioners and 63 had traction control systems. If 12% of cars with air conditioners had traction control systems, what percent of the cars without air conditioners had traction control systems?

A. 35
B. 36
C. 38
D. 40
E. 45

M18-26
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Kudos [?]: 50 [0], given: 8

Re: Among the 200 cars displayed at an auto show, 50 had built-i [#permalink] New post 20 Aug 2009, 09:22
bipolarbear wrote:
Among the 200 cars displayed at an auto show, 50 had built-in air conditioners and 63 had traction control systems. If 12% of cars with air conditioners had traction control systems, what percent of the cars without air conditioners had traction control systems?

* 35
* 36
* 38
* 40
* 45

don't we need to say that all cars at the show could only have AC or traction systems or both?


From the question, i arrived at 38%.

total no.of cars = 200;
Cars with air conditioning = 50
Cars without air conditioning = 200-50 = 150
Cars wtih traction system = 63
Cars with A/C and traction = 12% of A/c = 6
so rest of the traction systems are installed in non A/C cars which is 57/150 = 38%
Re: Among the 200 cars displayed at an auto show, 50 had built-i   [#permalink] 20 Aug 2009, 09:22
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