Three years ago average age of a family of 5 members was 27, years. On addition of a child to family

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4.Average

easy

Three years ago the average age of a family of $5$ members was $27\, years.$ On addition of a child to the family, the present average age of the family is still $27 \,years.$ Find out the present age of the child. (in $years$)

A

$16$

B

$12$

C

$24$

D

$20$

Solution

Old average $=27$

No. of years added $=3 \times 5=15$ years.

Age of Child $=27-15=12$ years

Standard 13

Quantitative Aptitude

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