Instructions
In each of the following questions, a series is given, with
one term missing. Choose the correct alternative from the given ones that will complete the series.
Question 167
The average age of father and his son is 22 years. The ratio of their ages is 10 : 1 respectively. What is the age of the son ?
Solution
Let the age of father be 10z and Son be z years
given that average age of father and son = 22 years
$$\frac{10z+z}{2}$$ = 5.5z = 22
z = 4
So age of Son = 4 years
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