Civil Service Exam Reviewer · Averages · hard
The average age of 17 committee members increases by 2.5 years when a member aged 41 is replaced by a new member. How old is the new member?
- 43.5 years old
- 83.5 years old
- 81 years old
- 86 years old
Answer
B. 83.5 years old
Solution
Total age rises by 17 × 2.5 = 42.5. New member = 41 + 42.5 = 83.5.
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