SOLUTION: On the first 4 tests your average is 84%. If you think you can score 94% on all the remaining tests, how many more tests do you need to bring your average over 90%?

Question 561203: On the first 4 tests your average is 84%. If you think you can score 94% on all the remaining tests, how many more tests do you need to bring your average over 90%?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = number of tests needed with score of
94% to average over 90%

7 is the number of tests needed with score of
94% to average over 90%
( 6 test gives exactly 90% average )
check answer:

OK
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