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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?

A25 years

B22 years

C20 years

D28 years

Answer:

A. 25 years

Read Explanation:

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.


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