Problema Solution
going into the final exam which will count as two tests, brooke has test scores of 80,83,71,61,95. What score does brooke need on the final exam in order to have an average score of 80?
Answer provided by our tutors
(80 + 83 + 71 + 61 + 95 + x + x) / 7 = 80
(390 + 2x) / 7 = 390
390 + 2x = 560
2x = 560 - 390
2x = 170
x = 85