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Question 65
Average age of motherand father is 28 years. Average age of mother, father and their child is 20 years. What is the age of child?
Solution
age of mother and father = $$\frac{m+f}{2}$$ = 28
 = m+f=56Â
=Â $$\frac{m+f+c}{2}$$ = 20
= m+f+c =60
= c = 60-56
=4 yearsÂ
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