Civil Service Exam Reviewer · Averages · hard
The average of 15 test scores was computed as 61. Later it was found that a score of 87 had been recorded as 102. What is the correct average?
- 62
- 60
- 61
- 46
Answer
B. 60
Solution
Wrong sum = 915. Correct sum = 915 − 102 + 87 = 900. Correct average = 60.
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