NECO Mathematics 2024 Objective — Question 40
Question 40 of 50 from the National Examinations Council (NECO) Mathematics 2024 Objective paper, with the correct answer and a full explanation.
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Using the masses in Q39, calculate the variance of the distribution.
- A. A. 35
- B. B. 36
- C. C. 40Correct
- D. D. 50
Explanation
Using mean≈50.14: Σ(x−mean)²≈278.9. Variance=Σ(x−mean)²/n=278.9/7≈40.
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