Civil Service Exam Reviewer · Averages · hard
The average age of 7 committee members increases by 1.5 years when a member aged 31 is replaced by a new member. How old is the new member?
- 32.5 years old
- 40 years old
- 41.5 years old
- 43 years old
Answer
C. 41.5 years old
Solution
Total age rises by 7 × 1.5 = 10.5. New member = 31 + 10.5 = 41.5.
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