Bunuel wrote:

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

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

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Jeffery Miller

Head of GMAT Instruction

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