Suppose the weather records show that, on an average, 5 out of 31 days in October are rainy days. Assuming a binomial distribution, with each day of…

CA Foundation · Quantitative Aptitude · MTP · September 2026
Suppose the weather records show that, on an average, 5 out of 31 days in October are rainy days. Assuming a binomial distribution, with each day of October as an independent trial, the probability that the next October will have at most 3 rainy days is:
(A) A. 0.4403
(B) B. 0.2403
(C) C. 0.3403
(D) D. None of these

Suggested Answer and Working Notes:

Correct Answer: Option (B)

B. 0.2403

Topics: Part-C: Statistics

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