Question: 4.57 Let X be a random variable with the following probability distribution: x 3 6 9 f(x) 16 1 3 1 2 Find E(X) and

4.57 Let X be a random variable with the following probability distribution:

x −3 6 9 f(x) 16 1

3 1

2 Find E(X) and E(X2 ) and then, using these values, evaluate E[(2X + 1)2 ].

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