SOLUTION: Steven has an average of 76% on his first 5 tests. What is the lowest score that he can get on his next test to have an average of 80% on all of his tests?
a. 76% b. 80% c. 90%
Algebra.Com
Question 240682: Steven has an average of 76% on his first 5 tests. What is the lowest score that he can get on his next test to have an average of 80% on all of his tests?
a. 76% b. 80% c. 90% d. 100%
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
(76*5+X)/6=80
(380+X)/6=80
380+X=6*80
380+X=480
X=480-380
X=100 IS THE NECESSARY GRADE FOR THE NEXT TEST.
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