The average age of a family of 5 members is 24 years. If the age of youngest member be 6 years, find the average age of the family at the birth of the youngest member.
The total age of the 5 members = 120 years.
Age of the youngest member is 6 years.
Total age of the rest of the group = 114 years.
Average age = 114/4
Average age 6 years ago = 114/4 - 6 = 28.5 - 6 = 22.5 years.
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