Scott's average (arithmetic mean) golf score on his first four rounds was 18.What score does he need on his fifth round to drop his average score by 2 points?
Options:
(A) 68
(B) 72
(C) 8
(D) 88
(E) 312 Let's think first. Stream of consciousness:
Average score for first 4 rounds = 18
Average score after 5 rounds = 16
Score Scott needs on his 5th round to drop average score by 2 points = 18 - (2*5) = 8
So, the answer is (C).