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Consider a coin tossing random walk. S,, is the partial sum. Suppose a > 0. Using the reflection lemma, find the probability of a path
Consider a coin tossing random walk. S,, is the partial sum. Suppose a > 0. Using the reflection lemma, find the probability of a path such that S, 20, S2 20, ... , S,,_1 20, S,, = a
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