Probability
Alex flips a fair coin repeatedly until two consecutive flips are the same (HH or TT), and then stops. What is the probability that he stops on an even-numbered flip? Give the exact value as a fraction or a decimal.
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Alex flips a fair coin repeatedly until two consecutive flips are the same (HH or TT), and then stops. What is the probability that he stops on an even-numbered flip? Give the exact value as a fraction or a decimal.