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The average age of a committee of eight members is 40 years. A member aged 55 years retired and his place was taken by another member aged 39 years. Find the average age of the present committee.
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- 38 years
- 36 years
- 39 years
- 40 years
- 38 years
Correct Option: A
The average age of eight members = 40 years
Sum of age of 8 members = 8 × 40 = 320 years
After a person of age 55 years retires,
Sum of ages of 7 persons = 320 – 55 = 265 years
Sum of ages of 8 persons when a man of age 39 years joins it = 265 + 39 = 304 years
∴ Required average = 304 ÷ 8 = 38 years
