SOLUTION: the average of six numbers is 65 the average of five of them is 72 find the sixth number

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Question 836126: the average of six numbers is 65 the average of five of them is 72 find the sixth number
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
The average is the sum of the numbers divided by the count of numbers.
Let A,B,C,D,E, and F be the numbers.
%28A%2BB%2BC%2BD%2BE%2BF%29%2F6=65
A%2BB%2BC%2BD%2BE%2BF=390
.
.
%28A%2BB%2BC%2BD%2BE%29%2F5=72
A%2BB%2BC%2BD%2BE=360
.
.
%28A%2BB%2BC%2BD%2BE%29%2BF=390
360%2BF=390
F=30