(a) P(x = 21) Т f(x) Let a be a discrete random variable with probability density function f(x), as shown in the table above. Determine the following: Round all answers to 3 decimal places. (b) P(x > 22 or x < 20) = 19 20 21 22 23 0.2 0.2 0.1 0.1 0.4

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