Problema Solution
.Sue has scores 90, 85, and 83 on her first three math tests.
What is Sue’s average?
If Sue wants an average of 90, what score does she need on her fourth test?
Answer provided by our tutors
The average of 90, 85 and 83 is:
(90 + 85 + 83)/3 = 86
Let 'x' represent the score on the fourth tests then the average is:
(90 + 85 + 83 + x)/4 = 90
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click here to see the equation solved for x
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x = 102
Sue needs a score of 102 on her fourth test.