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Mathematics 13 Online
OpenStudy (anonymous):

The average age of 5 children is 9. If four of the ages are 4,7,13 and 15, what is the age of the fifth child?

OpenStudy (anonymous):

5 average is 9 the formula for mean is Mean = (sum of results)/(number of results)

OpenStudy (anonymous):

(4 + 7 + 13 + 15 + x)/5 = mean so solve for x

OpenStudy (anonymous):

I'm not going to do it for you

OpenStudy (anonymous):

But I'm willing to help you solve it whereever you have problems.

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