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A coin is tossed 4 times. Let X denote t...

A coin is tossed 4 times. Let X denote the number of heads. Find the probability distribution of X. Also, find the mean and variance of X.

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The correct Answer is:
`P(0)=(1)/(16),P(1)=(1)/(4),P(2)=(3)/(8),P(3)=(1)/(4),P(4)=(1)/(16);2,1`.
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