Civil Service Exam Reviewer · Averages · hard
In a 10-item quiz, the scores and number of students were: 5 (9), 6 (6), 7 (5), 8 (1), 9 (5), 10 (9). What is the mean score?
- 7.5
- 43.17
- 7.9
- 7.4
Answer
D. 7.4
Solution
Σ(score × frequency) = 259; total students = 35. Mean = 259 ÷ 35 = 7.4.
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