3 years ago the average age of a family of 5 persons was 27 years On the addition of a child t...........

Quantitative Aptitude ( CCS) Average

3 years ago, the average age of a family of 5 persons was 27 years. On the addition of a child, the present average age is still 27years. Find the present age of the child.

16 years

12 years

24 years

20 years

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Explanation:

3 years ago,
The total age of 5 members = 5 × 27 =135 years
At Present, total age of 5 members = 135 + 15 = 150 years
At Present, the total age of 6 members = 6 × 27 =162 years.
So the age of the child = 162 – 150 = 12 years.