SOLUTION: The average age of 30 boys in a class is 13 years , 9 more boys whose average age is 15 years join the class. Find the average of the whole class?
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Question 891485: The average age of 30 boys in a class is 13 years , 9 more boys whose average age is 15 years join the class. Find the average of the whole class?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
The average age of 30 boys in a class is 13 years ,
9 more boys whose average age is 15 years join the class.
Find the average of the whole class?
:
That is a total of 39 boys divided into two groups
Av =
Av =
Av = 525/39
Av = 13.5 av of the whole class
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