Civil Service Exam Reviewer · Averages · easy

What is the average of all whole numbers from 18 to 41, inclusive?

1. 30
2. 29.5
3. 708
4. 20.5

Answer

B. 29.5

Solution

For consecutive numbers, the average is (first + last)/2 = (18 + 41)/2 = 29.5.

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