WAEC Mathematics 2023 Objective — Question 25
Question 25 of 50 from the West African Examinations Council (WAEC) Mathematics 2023 Objective paper, with the correct answer and a full explanation.
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Find the mean deviation of the set of numbers: 14, 15, 16, 17, 18 and 19.
- A. 1.7
- B. 1.5Correct
- C. 2.5
- D. 1.3
Explanation
Mean=(14+15+16+17+18+19)/6=99/6=16.5. Mean deviation=Σ|x-x̄|/n=(2.5+1.5+0.5+0.5+1.5+2.5)/6=9/6=1.5.
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