Question 31

Five years ago, the average age of a couple was 24. At present, the average of the couple and a child is 20. What is the child's age?

Solution

Let say , individual ages of couple and child are a,b and c respectively.

(a-5)/2 + (b-5)/2 =24

or, (a+b)=58........(1)

At present, total age of them=60.

So, a+b+c=60

or, c=60-58=2.

B is correct choice.

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