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GMAT Set 5 Q3

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GMAT Set 5 Q3

by Abhijit K » Wed Feb 18, 2015 1:13 am

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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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by Uva@90 » Wed Feb 18, 2015 5:55 am
Abhijit K 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
Hi,

As per the Question RED: BLACK cars are in ratio 3:8

And also Total # Black cars are 72. So, 8*X = 72 ==> X = 9

So Total # Red cars must be 3*9 = 27
Hence OA D

Regards,
Uva.
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by Uva@90 » Wed Feb 18, 2015 5:55 am
Abhijit K 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
Hi,

As per the Question RED: BLACK cars are in ratio 3:8

And also Total # Black cars are 72. So, 8*X = 72 ==> X = 9

So Total # Red cars must be 3*9 = 27
Hence OA D

Regards,
Uva.
Known is a drop Unknown is an Ocean
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by Brent@GMATPrepNow » Wed Feb 18, 2015 7:54 am
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
Use equivalent ratios here
red/black: 3/8 = x/72
Cross multiply to get: 8x = (3)(72)
Divide both sides by 8 to get: x = (3)(9)
x = 27

Answer: D

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
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Re: GMAT Set 5 Q3

by Scott@TargetTestPrep » Sat Dec 19, 2020 4:44 pm
Abhijit K wrote: ↑
Wed Feb 18, 2015 1:13 am
 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
Solution:

We can let x = the number of red cars and create the equation:

x/72 = 3/8

8x = 216

x = 27

Answer: D

Scott Woodbury-Stewart
Founder and CEO
[email protected]

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