Answer to GMAT Question #10

Here is the answer to GMAT Practice Question #10

Answer: A

Explanation:
Using the information in Statement (1), we can solve for the number of man-hours by using the expression:

See Figure 1

This gives us the additional number of hours past 100, so we have a total of 150 hours.

The information in Statement (2) tells us that ABC charged an additional $4,000 for consulting fees past 100 hours. However, since we do not know the rate per additional hour, we cannot determine the number of additional hours in order to find the total. Therefore, the information in Statement (2) is not sufficient to answer the question, and Statement (1) alone is sufficient to answer the question.

The answer and explanation to GMAT Practice Question #10 was written by Integrated Learning, a company that provides professional and private one on one tutoring services.