EMP Q.40

40What 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
where p_i denote probability of occurrence of x_i
Let q = 1-p
Then probabilities of succession 1st, 2nd, 3rd
trials are
p, qp, q²p,......

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