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7) If the probability distribution for the random variable Xis given in the table, what is the Expected value of the random variable X?

7) If the probability distribution for the random variable Xis given in the table, what is the Expected value of the random variable X? (a) Xi -3 1 4 Pi 0.3 0.5 0.2 (b) Xi -3 -2 -1 0 1 2 Pi 0.3 0.4 0.2 -0.3 0.1 0.3

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