SOLUTION: On your first four tests, you scored 80%, 76%, 99%, and 91%. What do you have to get on the final test to average at least an 80% for the course?

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Question 683749: On your first four tests, you scored 80%, 76%, 99%, and 91%. What do you have to get on the final test to average at least an 80% for the course?

Found 2 solutions by lynnlo, MathTherapy:
Answer by lynnlo(4176) (Show Source):
You can put this solution on YOUR website!
80+76+99+91+55=401
divided by 5======80.2

Answer by MathTherapy(10557) (Show Source):
You can put this solution on YOUR website!

On your first four tests, you scored 80%, 76%, 99%, and 91%. What do you have to get on the final test to average at least an 80% for the course?

Let the grade on 5th and final test be F
Then:

----- Cross-multiplying

In order to have at least an average of 80%, a score of 54% or more has to be attained on the final test.

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