Average age of a husband and wife, who were married 7 ,years ago, was 25, years at time of their mar

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The average age of a husband and wife, who were married $7 \,years$ ago, was $25\, years$ at the time of their marriage, Now, the average age of the family, including husband, wife and a child, born during the interval, is $22\, years.$ What is the present age of the child in $year$ ?

A

$4$

B

$2$

C

$3$

D

$5$

Solution

Present age of Husband and wife $=25 \times 2+7 \times 2=64$ years Present age of Husband wife and child $=22 \times 3=66$ years

Age of a child is $=66-64=2$ years.

Standard 13

Quantitative Aptitude

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