The daily demand for calculators has the following probability distribution: Demand X 1 2 3 4 5 6 Probability P(X) 0.10 0.15 0.20 0.25 0.18 0.12…

CA Foundation · Quantitative Aptitude · MTP · September 2026
The daily demand for calculators has the following probability distribution: Demand X 1 2 3 4 5 6 Probability P(X) 0.10 0.15 0.20 0.25 0.18 0.12 Determine the variance of the demand.
(A) A. 2.54
(B) B. 2.93
(C) C. 2.22
(D) D. 2.19

Suggested Answer and Working Notes:

Correct Answer: Option (C)

C. 2.22

Topics: Part-C: Statistics

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