SOLUTION: Keith has scored 84,75,81, and 80 on his previous four tests. What score does he need on his next test so that his average (mean) is 83?

SOLUTION: Keith has scored 84,75,81, and 80 on his previous four tests. What score does he need on his next test so that his average (mean) is 83?

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Question 915837: Keith has scored 84,75,81, and 80 on his previous four tests. What score does he need on his next test so that his average (mean) is 83?

Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
x the score he needs
(84+75+81+80 +x)/5 = 83
x = 415 - (84+75+81+80)
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