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A comics bookstore has comics only of Superman, Batman and

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A comics bookstore has comics only of Superman, Batman and

by BTGmoderatorLU » Thu Aug 02, 2018 5:29 pm

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Source: e-GMAT

A comics bookstore has comics only of Superman, Batman and Flash. What percent of all comics in the store is on Batman?

(1) The ratio of the number comics of Flash, Batman and Superman, in the library is 2:7:5.
(2) There are 14 Batman comics in the library.

The OA is A.
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Source: — Data Sufficiency |

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by Jay@ManhattanReview » Thu Aug 02, 2018 10:04 pm

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BTGmoderatorLU wrote:Source: e-GMAT

A comics bookstore has comics only of Superman, Batman and Flash. What percent of all comics in the store is on Batman?

(1) The ratio of the number comics of Flash, Batman and Superman, in the library is 2 : 7 : 5.
(2) There are 14 Batman comics in the library.

The OA is A.
Since the question wants an answer in percent, we necessarily do not need actual values.

Let's take each statement one by one.

(1) The ratio of the number comics of Flash, Batman and Superman, in the library is 2 : 7 : 5.

Given, the ratio of the number comics of Flash, Batman and Superman in the library is 2 : 7 : 5, on the ratio scale, the total number of comics = 2 + 7 + 5 = 14, and the total number of comics on Batman = 7.

Thus, percent of all comics on Batman = (7/14)*100% = 50%. Sufficient.

(2) There are 14 Batman comics in the library.

We do have any information about the total number of comics. Insufficient.

The correct answer: A

Hope this helps!

-Jay
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