If the sum of ten values is 20 and sum of squares of these values is 80, then the standard deviation is ____

CA Foundation · Quantitative Aptitude · PYQS · September 2025
If the sum of ten values is 20 and sum of squares of these values is 80, then the standard deviation is ____
(A) A. 1
(B) B. 2
(C) C. 1 / 2
(D) D. 4

Suggested Answer and Working Notes:

Correct Answer: Option (B)

B. 2

Topics: Part-C: Statistics

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