Mathematics, 24.02.2021 02:30 katelynzaro

An unfair coin is weighted so that the expected number of tails before the first heads is 3. What is the standard deviation of the number of tails that come up before the first heads?

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An unfair coin is weighted so that the expected number of tails before the first heads is 3. What i...

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An unfair coin is weighted so that the expected number of tails before the first heads is 3. What is the standard deviation of the number of tails that come up before the first heads?​

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An unfair coin is weighted so that the expected number of tails before the first heads is 3. What is the standard deviation of the number of tails that come up before the first heads?