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May 19, 2013

# Homework Help: Math

Posted by bria on Saturday, July 14, 2012 at 7:45pm.

The mean of five numbers is 8. If one of the numbers is removed from the list, the mean becomes 7. what is the number that was removed.

I could not figure this out.

• Math - Ms. Sue, Saturday, July 14, 2012 at 7:48pm

Suppose the numbers were
4, 6, 8, 10, 12

Which number could you remove to get a mean of 7?

• Math - Reiny, Saturday, July 14, 2012 at 7:54pm

"The mean of five numbers is 8"
would imply that the total of the 5 numbers had to be 40
So now you have only 4 numbers with a mean of 7
which implies that the new total is 28

What is 40 - 28 ?

• Math - bria, Saturday, July 14, 2012 at 8:11pm

thanks for the explaning it. I understand that much better

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