Civil Service Exam Reviewer · Averages · hard
The average of 25 test scores was computed as 41. Later it was found that a score of 64 had been recorded as 36. What is the correct average?
- 39.88
- 41
- 42.12
- 69
Answer
C. 42.12
Solution
Wrong sum = 1025. Correct sum = 1025 − 36 + 64 = 1053. Correct average = 42.12.
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