HKD1710 wrote:

Paul's average bowling score for a series was 164 and Dave's was 158. If each of them bowled 4 games, how much greater was Paul's total score for the series than Dave's score?

(A) 6

(B) 12

(C) 18

(D) 24

(E) It cannot be determined from the information given.

Since sum = average x quantity, Paul’s total score was 164 x 4 and Dave’s total score was 158 x 4.

Thus, Paul’s total score was 164 x 4 - 158 x 4 = 4(164 - 158) = 4 x 6 = 24 points greater than Dave’s.

Answer: D

_________________

Scott Woodbury-Stewart

Founder and CEO

GMAT Quant Self-Study Course

500+ lessons 3000+ practice problems 800+ HD solutions