SOLUTION: The average of 9 numbers is 43. When one of the numbers is subtracted. The new mean is 47. When is the number?

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Question 1006020: The average of 9 numbers is 43. When one of the numbers is subtracted. The new mean is 47. When is the number?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
The average of 9 numbers is 43.
When one of the numbers is subtracted.
The new mean is 47. What is the number?
:
Find total of the 9 original numbers; 9 * 43 = 387
:
%28387-n%29%2F8 = 47
multiply both sides by 8
387 - n = 8(47)
-n = 376 - 387
-n = -11
n = 11 is the subtracted number