Civil Service Exam Reviewer · Averages · hard
In a 10-item quiz, the scores and number of students were: 5 (6), 6 (7), 7 (2), 8 (3), 9 (4), 10 (2). What is the mean score?
- 7.5
- 27.67
- 6.92
- 7.42
Answer
C. 6.92
Solution
Σ(score × frequency) = 166; total students = 24. Mean = 166 ÷ 24 = 6.92.
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