Homework Help: Math

Posted by Ashlie on Monday, May 28, 2012 at 6:11pm.

The mean age of a class of twenty five students is 23.4 years. How old would a twenty sixth student have to be for the mean age of the class to be 24.0 years?

Math - Reiny, Monday, May 28, 2012 at 7:02pm
The sum of ages of the 25 students = 25(23.4) = 585

the sum of ages of 26 students = 26(24) = 624

So the 26th student must be 624-585 or 39 years old

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