1) a. A random variable X has the following probability distribution: 0 x B 5 x B 20 x B X 10 x B 15 x В 25 x B P(X = x) 0.1 2n 0.2 0.1 0.04 0.07 %3D а. Find the value of n. Find the mean/expected value E(x), variance V (x) and standard deviation of the given probability distribution. Find E(-4A x + 3) and V(6B x – 7) b. С.

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