GRE Sample Test 5 Quantitative Reasoning 1

Question : 11 of 20

Marks: +1, -0

On Tuesday, a salesman made four sales. On the first three sales, the salesman received a commission of

\$

2,100,

\$

1,500, and

\$

1,800. If the salesman’s average commission for all four sales was

\$

2,000, what was the salesman’s commission on the fourth sale?

Solution:

\$

2,600 was the salesman’s commission on the fourth sale. Since the average of the four commissions is

\$

2,000, the total must be

\$

2,000 × 4 =

\$

8,000. Subtracting the total of the other three commissions from

\$

8,000 gives the commission on the fourth sale.

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