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 75, 67, and 79?
A)99
B)80
C)73.7
D)75.3

Question

Quizplus · Accepted Answer

To achieve an average of 80 over four tests, Bill needs a total of 4 * 80 = 320 points. His first three scores sum up to 75 + 67 + 79 = 221 points. Therefore, to reach 320 points in total, he needs 320 - 221 = 99 points on the fourth test.

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