SOLUTION: a student scores 82%,86% and 78% on her three exams. What score is needed on the fourth exam for the student to have an average of 85% for all four exams ?

Question 651368: a student scores 82%,86% and 78% on her three exams. What score is needed on the fourth exam for the student to have an average of 85% for all four exams ?
Found 2 solutions by ewatrrr, Aaniya:
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

Hi,
a student scores 82%,86% and 78% on her three exams.
What score is needed on the fourth exam for the student to have an average of 85% for all four exams
solve for x
Answer by Aaniya(63) (Show Source): You can put this solution on YOUR website!
score will be 94
82,86,78,94 =340
divide by your 4 exams=85
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