The average age of a family of 18 members is 82 years. If the age of the youngest member is 12 years

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11 Nov 2020 AVERAGE

The average age of a family of 18 members is 82 years. If the age of the youngest member is 12 years, the average age of the family at the birth of the youngest member was?

OPtion

1) 75
2) 70
3) 78
4) 95
5) 85
6) 72
7) 82
8) 92
9) 79
10) None of the above

Solution

Total age of the family of 18 members = 82* 18 = 1476 yrs
Total age of the family members 12 yrs ago = 1476 - (18*12) = 1260
At the time total members in a family = 18
Average age of the family at the birth of the youngest member = 1260/18 = 70yrs.

Correct Option: 2 Best Solution (3)