Question: Find the expected value of the random variable X in each of the three cases below, where f (x) denotes the probability function of X:

Find the expected value of the random variable X in each of the three cases below, where f (x) denotes the probability function of X: (i) X 012 2 3 f(x) 0.5 0.1 0.3 0.1 (ii) (iii)

(i) X 012 2 3 f(x) 0.5 0.1 0.3 0.1 (ii) (iii) x 1 2 34 f(x) 0.2 0.3 0.4 0.1 x 2 4 68 f(x) 0.1 0.2 0.3 0.4

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