SOLUTION: Justin has a grade of 94 and 88 in his first two tests. what must he score on his third test in order to have an average of at least 90?

Question 800136: Justin has a grade of 94 and 88 in his first two tests. what must he score on his third test in order to have an average of at least 90?
Found 2 solutions by Cromlix, mananth:
Answer by Cromlix(4381) (Show Source): You can put this solution on YOUR website!
An average of 90 with 3 tests
= 3*90 = 270 total marks.
Totaling 94 + 88 = 182
270 - 182
= 88.
Justin requires to score 88
in his third test to achieve
an average of 90 on the three tests.
Hope this helps.
:-)
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
let third test score be x
(88+94+x)/3 = 90
182+x=270
x=270-182
x=88
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