SOLUTION: a student averages 84 on 5 tests. if the student received grades of 84, 82, 81, and 79 on the first four tests, what grade did the student receive on the fifth exam?

Algebra ->  Algebra  -> Average -> SOLUTION: a student averages 84 on 5 tests. if the student received grades of 84, 82, 81, and 79 on the first four tests, what grade did the student receive on the fifth exam?      Log On

Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!
Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!

   

Question 610598: a student averages 84 on 5 tests. if the student received grades of 84, 82, 81, and 79 on the first four tests, what grade did the student receive on the fifth exam?
Answer by Bb(19) About Me  (Show Source):
You can put this solution on YOUR website!
In order to get an average of 84% on 5 exams you can take 0.84%2A500=420 this tells you that if you subtract the known averages from 420 it gives you the fifth exam score. The equation looks like this 420-84-82-81-79=94. To test this you can add up all five exam scores and find the average. This will show that 94 on the last exam is correct.