There are 200 cats in Cat-City. Out of the 200, 70 are

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BTGmoderatorLU: Moderator; Posts: 2650; Joined: Sun Oct 15, 2017 1:50 pmFollowed by: 6 members

by BTGmoderatorLU » Wed Aug 29, 2018 2:50 pm

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Source: Official Guide

There are 200 cats in Cat-City. Out of the 200, 70 are street cats and the rest are domestic cats. 110 cats are gray, 30 out of the gray cats are NOT domestic ones. How many domestic cats are there which are not gray in Cat-City?

A. 90
B. 80
C. 50
D. 40
E. 25

The OA is C.

Source: Beat The GMAT — Problem Solving | Wed Aug 29, 2018 2:50 pm

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Jay@ManhattanReview: GMAT Instructor; Posts: 3008; Joined: Mon Aug 22, 2016 6:19 amFollowed by: 34 members; Location: Grand Central / New York; Thanked: 470 times

by Jay@ManhattanReview » Wed Aug 29, 2018 10:58 pm

BTGmoderatorLU wrote:Source: Official Guide

There are 200 cats in Cat-City. Out of the 200, 70 are street cats and the rest are domestic cats. 110 cats are gray, 30 out of the gray cats are NOT domestic ones. How many domestic cats are there which are not gray in Cat-City?

A. 90
B. 80
C. 50
D. 40
E. 25

The OA is C.

Pl. find the solution here.

The correct answer: C

Hope this helps!

-Jay
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Jeff@TargetTestPrep: GMAT Instructor; Posts: 1462; Joined: Thu Apr 09, 2015 9:34 amFollowed by: 22 members; Location: New York, NY; Thanked: 39 times

by Jeff@TargetTestPrep » Wed Sep 05, 2018 9:38 am

BTGmoderatorLU wrote:Source: Official Guide

There are 200 cats in Cat-City. Out of the 200, 70 are street cats and the rest are domestic cats. 110 cats are gray, 30 out of the gray cats are NOT domestic ones. How many domestic cats are there which are not gray in Cat-City?

A. 90
B. 80
C. 50
D. 40
E. 25

Since 70 are street cats, 130 are domestic.

Since 110 are gray, 90 are not gray.

Of the 110 gray cats, there are 30 gray cats that are street cats, so there are 110 - 30 = 80 gray cats that are domestic.

Thus, there are 130 - 80 = 50 cats that are domestic and not gray.

Answer: C

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