Question

Suppose that to make the golf team you need to score no more than 74 on average over 5 games. If you scored 77, 71, 77, and 67 in your first 4 games what is the highest score you can shoot in your 5th game and still make the team?

A. 76 B. 78 C. 79 D. 80

Answer 1

(77 + 71 + 77 + 67 + x) / 5 = 74
(292 + x) / 5 = 74
292 + x = 74 * 5
292 + x = 370
x = 370 - 292
x = 78 <===

Answer 2

No more than 74 on average of 5 games means no more than 370 shots on total. If you add all of the numbers up you will get 292, so he can still shoot 370-292=78 in the last round, which is answer choice B.