SOLUTION: Four Friends are told that the average (mean) of their grades for their favorite class is 84% Jack got 91%, Hailey got 72%, and Taylor got 80% Kevin's grade was not revealed.

Algebra ->  Average -> SOLUTION: Four Friends are told that the average (mean) of their grades for their favorite class is 84% Jack got 91%, Hailey got 72%, and Taylor got 80% Kevin's grade was not revealed.       Log On


   

Question 958774: Four Friends are told that the average (mean) of their grades for their favorite class is 84%
Jack got 91%, Hailey got 72%, and Taylor got 80%
Kevin's grade was not revealed.
What grade did Kevin get?
Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
To have an average of 84%, the sum of four grades must be 4(84)=336
The sum of the other three grades is 91+72+80=243
So Kevin's grade must be 336-243=93. ANSWER: Kevin's grade was 93%,