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Unformatted text preview: because you have to ip the coin at least once before you can stop. The probability generating function for the geometric distribution should be computed as follows: G X ( z ) = X n =1 p X ( n ) z n = X n =1 q n1 pz n = p q X n =1 ( qz ) n = p q qz 1qz = pz 1qz . Last compiled at 10:27 P.M. on October 9, 2009...
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 Summer '10
 WARREN
 Geometric Series, Probability

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