A certain class, consisting of a lecture and a question-and-answer session, lasted from 2:45 to 4:30 one afternoon...

[AAPL]

GMAT Prep

A certain class, consisting of a lecture and a question-and-answer session, lasted from 2:45 to 4:30 one afternoon. If the lecture lasted from 2:45 to 4:15, then the question-and-answer session was what fraction of the total class time?

A. 1/7
B. 1/6
C. 1/5
D. 1/4
E. 1/3

OA A

[Scott@TargetTestPrep]

GMAT Prep

A certain class, consisting of a lecture and a question-and-answer session, lasted from 2:45 to 4:30 one afternoon. If the lecture lasted from 2:45 to 4:15, then the question-and-answer session was what fraction of the total class time?

A. 1/7
B. 1/6
C. 1/5
D. 1/4
E. 1/3

OA A

Solution:

The total time was 105 minutes, and the lecture was 90 minutes. Thus, the question-and-answer session was 15 minutes, which is 15/105 = 1/7 of the total class time.

Answer: A