EMP Q.40

0. What would be the expectation of the number of failures preceding the first success in an infinite series of independent trials with the constant probability of success p ?

  • Option : C
  • Explanation : Expectation of X = E(X) = average = mean

    Probability

    where pi denote probability of occurrence of xi
    Let q = 1-p
    Then probabilities of succession 1st, 2nd, 3rd 
    trials are
                       p, qp, q2p,......

    Probability

Cancel reply

Your email address will not be published. Required fields are marked *


Cancel reply

Your email address will not be published. Required fields are marked *