Asked by Joseph

John who is 15 years old, is 3 years older than his younger brother Paul. If James their brother is 21years old. What is the average of the three brothers
Answered by oobleck
the average of three numbers is just 1/3 of their sum.
So, add 'em up and divide by 3.
The only trick is figuring out how old Paul is ...
Answered by John stanard
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