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The average age of 5 members of a family is 25 years. If the average age of two members in that family is 13 years, what is the average age (in years) of the other three members of the family?
1. 33
2. 34
3. 30
4. 31

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Correct Answer - Option 1 : 33

The average age of all 5 members of the family is 25 years while the average age of 2 members of this family is 13 years.

∴ Total age of the 5 members = 25 × 5 = 125 years

and, total age of the 2 members = 13 × 2 = 26 years

∴ Total age of the remaining 3 members of the family = 125 – 26 = 99 years

∴ Average age of the 3 members = 99/3 = 33 years

Hence, ‘33’ is the correct answer.

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