What is the standard deviation of the following series : Measurements: 0-10, 10-20, 20-30, 30-40 Frequency: 1, 3, 4, 2

CA Foundation · Quantitative Aptitude · MTP · May 2026
What is the standard deviation of the following series : Measurements: 0-10, 10-20, 20-30, 30-40 Frequency: 1, 3, 4, 2
(A) A. 81
(B) B. 7.6
(C) C. 9
(D) D. 2.26

Suggested Answer and Working Notes:

Correct Answer: Option (C)

C. 9

Topics: Part-C: Statistics

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