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5908概率中等数值题medium

Reaching the Target Against a House Edge

题目

You hold 33 chips and bet one chip per round on an even-money game that you win with probability p=0.4p=0.4 (and lose with probability 0.60.6). You keep playing until you either reach 55 chips (cash out) or hit 00 (broke). What is the probability you reach 55 chips before going broke?

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