jeff must have an average of 90 or above. if his test scores this semester are 88,91, and 95, what should the final test score be to earn an exact 90 average ?

Question

jeff wants an A in his math class.

Answer 1

If the average of 4 test scores is 90, the sum of 4 test scores must be 4×90=360.

So 360-(88+91+95)=360-274=86. He needs to score 86 to average exactly 90.