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Suppose that Anna and Ben will each toss a fair coin until an outcome of Heads...

Suppose that Anna and Ben will each toss a fair coin until an outcome of Heads is obtained. (I.e., each person will toss their coin until they obtain an outcome of Heads.) What is the probability that it will take Ben MORE THAN TWICE as many tosses as it takes Anna? (Make the usual assumptions regarding tosses of fair coins.)

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