RD Sharma - Mathematics (Volume 2)

Book: RD Sharma - Mathematics (Volume 2)

Chapter: 33. Binomial Distribution

Subject: Maths - Class 12th

Q. No. 3 of Exercise 33.2

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3

If the mean and variance of a binomial distribution are respectively 9 and 6, find the distribution.

Let X denote the variance with parameters n and p


p + q = 1 q = 1 - p


Given, mean = np = 9 and variance = npq = 6


npq = 6


9q = 6





Now, np = 9



n = 27



The required binomial distribution is given by,



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