Five years ago the average of husband and wife was 23 years. Today the average age of husband, wife and child is 20 years. How old is the child?
Answer & explanation
Correct answer: option 1
5 years ago,
Average age of husband and wife is = 23 years
Sum of ages of husband and wife = 23 × 2 = 46years
Sum of present ages of husband and wife = 46 + 10 = 56 years
At present , the average age of husband , wife and child = 20 years
Sum of present ages of husband, wife and child = 20×3 = 60 years
Age of child= 60 - 56 = 4 years