Find the mean number of heads in three tosses of a fair coin.

Explanation

The sample space of given experiment is

S ={(HHH), (HHT), (HTT), (TTT), (TTH), (THH), (HTH), (THT)}

Let X denotes the no. of heads in three tosses of a fair coin

Here, X is random which may have values `0, 1, 2, 3`.

Therefore, Probability distribution is, `P(X = 0) = 1/8,P(X = 1)`

= `3/8 P(X = 2) = 3/8, P(X = 3) = 1/8`



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