Consider n independent flips of a coin having probability p of landing on heads. Say that a

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Consider n independent flips of a coin having probability p of landing on heads. Say that a changeover occurs whenever an outcome differs from the one preceding it. For instance, if n = 5 and the outcome is HHTHT, then there are 3 changeovers. Find the expected number of changeovers.
Express the number of changeovers as the sum of n − 1 Bernoulli random variables.
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