A coin with probability for head as 1 / 5 is tossed 100 times, then the standard deviation of the number of heads turned up is

CA Foundation · Quantitative Aptitude · MTP · January 2026
A coin with probability for head as 1 / 5 is tossed 100 times, then the standard deviation of the number of heads turned up is
(A) A. 3
(B) B. 4
(C) C. 7
(D) D. 10

Suggested Answer and Working Notes:

Correct Answer: Option (B)

B. 4

Topics: Part-C: Statistics

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