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A total of 20 interns and 15 full-time employees work in the 35 offices of a company...

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A total of 20 interns and 15 full-time employees work in the 35 offices of a company...

by AAPL » Sun Feb 02, 2020 11:29 am
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A total of 20 interns and 15 full-time employees work in the 35 offices of a company, with one person working in each office. One office is selected at random to get an upgraded desk. What is the probability that the office selected will be that of a female intern?

1) Of the interns, 15 of them are female.
2) Of the interns, 5 of them are male.

OA D
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Source: — Data Sufficiency |

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Re: A total of 20 interns and 15 full-time employees work in the 35 offices of a company...

by Jay@ManhattanReview » Sun Feb 02, 2020 10:00 pm
AAPL wrote: ↑
Sun Feb 02, 2020 11:29 am
 Princeton Review

A total of 20 interns and 15 full-time employees work in the 35 offices of a company, with one person working in each office. One office is selected at random to get an upgraded desk. What is the probability that the office selected will be that of a female intern?

1) Of the interns, 15 of them are female.
2) Of the interns, 5 of them are male.

OA D
Say there are x interns out of 20 interns. Thus, the probability that the office selected will be that of a female intern = x/35

So, if we know the no of female interns, we get the answer.

Let's take each statement one by one.

1) Of the interns, 15 of them are female.

x= 15. Sufficient.

2) Of the interns, 5 of them are male.

=> x = 20 – 5 = 15. Sufficient.

The correct answer: D

Hope this helps!

-Jay
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