WAEC Further Mathematics 2025 Objective — Question 24
Question 24 of 40 from the West African Examinations Council (WAEC) Further Mathematics 2025 Objective paper, with the correct answer and a full explanation.
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The ages (in years) of 10 children in a school are 4, 4.5, 7.8, 9.5, 6, 9, 12.5, 11, 5 and 5.5. Calculate, correct to two decimal places, the mean deviation.
- A. 2.46
- B. 2.48Correct
- C. 2.52
- D. 2.58
Explanation
Mean = 7.48. Mean deviation = (sum of |x-mean|)/10 = 24.8/10 = 2.48.
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