Solve.
-Bill needs an average of 80 on four tests in science to make the honor roll. What is the lowest score he can receive on the fourth test if his first three scores are 84, 65, and 80?
A) 77.3
B) 91
C) 80
D) 76.3

Question

Quizplus · Accepted Answer

To achieve an average of 80 over four tests, Bill needs a total of 4 * 80 = 320 points. The sum of his first three scores is 84 + 65 + 80 = 229. Therefore, to reach 320 points, he needs 320 - 229 = 91 on the fourth test.

Solve. -Bill Needs an Average of 80 on Four Tests in in Science