The average of the present age of 6 members of a family is 42 years. The present age of the youngest member is 12 years. Then what was the average age of this family when the youngest member was born?
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Answer:
Total age of 6 members= 42 × 6 = 252
Total age of 5 members= 252 - 7 = 245
Average age of 5 members= 245/5 = 49
49-12 = 37
Hence, The average age of the family was 37 years at the birth of the youngest member.
Hope this helps:)
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