Ai occurs for 2 i n, prove that E(Un) = (n 1)pq, and find the

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Ai occurs for 2 ≤ i ≤ n, prove that E(Un) = (n −1)pq, and find the variance of Un. (Oxford 1977F)

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Probability An Introduction

ISBN: 9780198709978

2nd Edition

Authors: Geoffrey Grimmett, Dominic Welsh

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