SOLUTION: The average of four numbers is 4. Find the fifth number if the average of all these five numbers is 5.

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Question 813623: The average of four numbers is 4. Find the fifth number if the average of all these five numbers is 5.
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
4x=16
(16+y)/5=5
16+y=25
y=9