SOLUTION: If the average of 57 numbers is 85, what number must be added to give an average of 87?
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Question 678407: If the average of 57 numbers is 85, what number must be added to give an average of 87?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
If the average of 57 numbers is 85, what number must be added to give an average of 87?
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(57*85 + n)/58 = 87
n + 4845 = 58*87 = 5046
n = 201
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