Question

in your economics 101 class you have scores of 68,82,87 and 89 on the first four of five tests to earn a grade of a B or higher the average of the first five test scores must be greater than or equal to 80 find the minimum score that you can make on the last test and earn a B

Answer 1

(68 + 82 + 87 + 89 + x) / 5 > = 80
(326 + x) / 5 > = 80
326 + x > = 80 * 5
326 + x > = 400
x > = 400 - 326
x > = 74.......u would have to make at least a 74 to earn a B