The average age of x boys in a class is m years. If a boy of age y years joins the class , find the formula for the average age of the class. PLEASE SOLVE IT AS SOON AS POSSIBLE . PLEASE Show full method.
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Let the sum of ages of boys be a.
Then , a/x = m
a = mx
Now a boy of age y comes
So, (a+y)/(x+1)
(mx+y)/(x+1) is the new average of the age of class.
Then , a/x = m
a = mx
Now a boy of age y comes
So, (a+y)/(x+1)
(mx+y)/(x+1) is the new average of the age of class.
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