The expected value (mean) of a discrete random variable is given by:
$$E(X) = \sum x_iP(X = x_i)$$
where,
$$x_i :$$ Possible values of random variable
$$P(X = x_i) :$$ Probability of obtaining $$x_i$$
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The expected value (mean) of a discrete random variable is given by:
$$E(X) = \sum x_iP(X = x_i)$$
where,
$$x_i :$$ Possible values of random variable
$$P(X = x_i) :$$ Probability of obtaining $$x_i$$
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