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# The ratio of the number of red cars in a certain parking lot

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Manager
Joined: 08 Oct 2005
Posts: 94

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The ratio of the number of red cars in a certain parking lot [#permalink]

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05 Aug 2006, 08:22
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

The ratio of the number of red cars in a certain parking lot to the number of black cars is 3 to 8. If there are 72 black cars in the lot, how many red cars are there in the lot?

A. 11
B. 15
C. 24
D. 27
E. 32

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Senior Manager
Joined: 14 Jul 2005
Posts: 398

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05 Aug 2006, 10:15
D

3/8 = x/72

=> x = (72 * 3)/8 = 27

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SVP
Joined: 31 Jul 2006
Posts: 2302

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Schools: Darden

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05 Aug 2006, 11:40

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Manager
Joined: 20 Mar 2006
Posts: 200

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Re: The ratio of the number [#permalink]

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05 Aug 2006, 21:05
ong wrote:
The ratio of the number of red cars in a certain parking lot to the number of black cars is 3 to 8. If there are 72 black cars in the lot, how many red cars are there in the lot?

A. 11
B. 15
C. 24
D. 27
E. 32

R/B = 3/8
R = 3B/7
R= 3*72/8
R= 27

D
Heman

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Re: The ratio of the number   [#permalink] 05 Aug 2006, 21:05
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# The ratio of the number of red cars in a certain parking lot

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