Question

The average age of five members of a family is 30 years. If the present age of a youngest member of the family is 10 years, what was the average age of the family at the time of birth of the youngest member?

• A. 25 years
• B. 22 years
• C. 20 years
• D. 28 years

Answer 1

Answer:

A. 25 years

Total age of all the members of the family = 30*5= 150 years Total age of the four members at the time of birth of youngest= 150- 10*5= 100 years. Required average of family= 100/4= 25 years.