Question 905662
Five exams at 80 points = 400 points out of 500 in order to get a B.
The current scores are 52, 67, 83, 90
We can toss the 52 because it's going to be changed.
67 + 83 + 90 = 240
400 - 240 = 160 points needed for the final and changed test
160 / 2 = 80
That's the lowest score that the student can earn for a B.