SOLUTION: Consider a random experiment in which a coin is tossed three times. Let 'x' be the number Of heads. What is the variance of the Probability distribution of 'x'?

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Question 1041450: Consider a random experiment in which a coin is tossed three times. Let 'x' be the number
Of heads. What is the variance of the
Probability distribution of 'x'?

Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
If it is a fair coin, then the variance is 3%2A%281%2F2%29%2A%281%2F2%29+=+3%2F4.
If it is not a fair coin, then the variance is np%281-p%29+=+3p%281-p%29,
where p is the probability of a head turning up in a single toss.