SOLUTION: A student�s test scores are 86, 72, 85, and 90. What is the lowest score that the student can get on the next test and still have a test average (mean) of at least 80?

SOLUTION: A student�s test scores are 86, 72, 85, and 90. What is the lowest score that the student can get on the next test and still have a test average (mean) of at least 80?

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Question 230560: A student�s test scores are 86, 72, 85, and 90. What is the lowest score that
the student can get on the next test and still have a test average (mean) of at
least 80?
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
Let x=the next test score to give an average of 80
(86+72+85+90+x)/5=80
(86+72+85+90+x)=400
333+x=400
x=67
.
Ed
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