SOLUTION: Melinda scored 84%, 75% and 77% on her first three tests of the term. What score will she need to earn on her fourth test in order to have an average of 80% on the first four tes

Question 1155409: Melinda scored 84%, 75% and 77% on her first three tests of the term. What score will she
need to earn on her fourth test in order to have an average of 80% on the first four tests?

Found 2 solutions by Boreal, ewatrrr:
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
average=total/n
so n*average=total
therefore, 4*80=320, the required total
three are 84/75/77, which add to 236
the fourth has to be 320-236=84.
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

Hi
scored 84%, 75% and 77% on her first three tests
What score will she need to earn on her fourth test ***Let that be x
average of 80% on the first four tests...

84%, the score she will need to earn on her fourth test
Wish You the Best in your Studies.

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