The average age of the family of five members is 24. If the present age of youngest member is 8 yr, then what was the average age of the family at the time of the birth of the youngest member?
Explanation
Given,
Total age of five members = 5×24
=120 yr
8 yr ago, total age of the family = 120-40
= 80 yr
∴ Average = = 20 yr
Hence, Option A is correct.
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