Question

The average age of a husband and a wife is 23 years when they were married five years ago but now the average age of the husband, wife and child is 20 years(the child was born during the interval). what is the present age of the child?

a. 1 year

b. 2 years

c. 3 years

d. 4 years

Answer 1

Avg age of couple married time =23
then total age 2*23=46
5yrs later means present age
persent age of couple 46+10=56 each one increase 5yrs
& Avg age of couple+child=20
total age of couple+child=20*3=60
hence Age of child=60-56=4 yrs