Consider a sequence of independent Bernoulli trials with probability of success in each trial being 1/3. Let X denote the number of trials required to get the second success. Then P(Xge 5) equals

Q23Section A (Section A)23 of 60

Waiting for the second success

Consider a sequence of independent Bernoulli trials with probability of success in each trial being $\dfrac{1}{3}$ . Let $X$ denote the number of trials required to get the second success. Then $P(X\ge 5)$ equals

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