Word problem homie

Question

You are trying to earn a B+, 87.5% - 89.5%, or better in a college level math course. The grade for the course is a result of averaging the scores on the five unit exams. Assuming each of the five exams is worth 100 points, find the minimum score that you can afford to earn on the last test if your score on the first four exams are as follows: 75, 89, 98.5, and 95.

Answer 1

(75 + 89 + 98.5 + 95 + x)/5 = 87.5

 

(75 + 89 + 98.5 + 95 + x) = 437.5

 

x = 80