NABTEB Mathematics 2025 Objective — Question 54
Question 54 of 60 from the National Business and Technical Examinations Board (NABTEB) Mathematics 2025 Objective paper, with the correct answer and a full explanation.
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Calculate the variance of the following data: 2, 3, 5, 6.
- A. 4.00
- B. 2.50Correct
- C. 2.00
Explanation
Mean = (2+3+5+6)/4 = 4. Variance = ((2-4)^2+(3-4)^2+(5-4)^2+(6-4)^2)/4 = (4+1+1+4)/4 = 2.5.
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