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 · September 2025
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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