Razorpay Interview Question | Binomial Random Variable

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What is the expected value of a binomial random variable in a binomial distribution? Given number of repeated trials is n and the probability of success is P.

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Dhruv2301 55 years 0 Answers 528 views Great Grand Master 0

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    In a binomial distribution ,
    Probability of a random variable at any point is denoted by C(n,r).p^r.(1-p)^(n-r)

    where n=no of trials
    p=probaility of random variable
    r= no of successes after n trails

    Now expected value is
    EV=x1.P(X=x1)+x2.P(X=x2)+x3.P(X=x3)…+xn.p(X=xn)

    where X=Random variable.
    and X can take values x1,x2,x3,…,xn

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