Question 246318: If your average is a 88 what's the lowest grade you can make on a test to keep your average a b? Answer by Theo(13342) (Show Source):
You can put this solution on YOUR website! if you assume a B average is 80, and if the weighting for all the tests is equal and you are only talking about 2 tests, then:
(x + 88)/2 = 80
multiply both sides of this equation by 2 to get:
x + 88 = 160
subtract 88 from both sides of this equation to get:
x = 160-88 = 72
lowest score you can get is 72 to keep an 80 average.
