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A person decides to toss a biased coin with P(heads) = 0.2 repeatedly until he gets a head. He will make at most 5

A person decides to toss a biased coin with P(heads) = 0.2 repeatedly until he gets a head. He will make at most 5 tosses. Let the random variable Y denote the number of heads. Find the variance of Y. [5 pts]

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