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Post-UTME Mathematics 2013 Objective — Question 40

Question 40 of 100 from the Post-UTME Screening (Post-UTME) Mathematics 2013 Objective paper, with the correct answer and a full explanation.

The variance of the scores 1,2,3,4,5 is

A. 1.2
B. 1.4
C. 2.0Correct
D. 3.0

Explanation

Mean=3. Sum of squared deviations = 4+1+0+1+4=10. Variance=10/5=2.0.

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