- Home
- Standard 13
- Quantitative Aptitude
4.Average
medium
Five years ago the average age of husband and wife was $23\, years.$ Today the average age of husband, wife and child is $20 \,years.$ How old is child in $years$ ?
A
$3$
B
$4$
C
$12$
D
$2$
Solution
Sum of the present age of Husband and wife
$=23 \times 2+5 \times 2=56 \text { years }$
Sum of the present age of Husband, wife and child
$=20 \times 3=60$
Age of child $=60-56=4$ $years.$
Standard 13
Quantitative Aptitude