Question: Let X be a random variable with the following probability distribution: Value x of X P = X 4 0.10 5 0.05 6 0.10 7

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

Value x of X P=X

4 0.10

5 0.05

6 0.10

7 0.45

8 0.30

Find the expectation E Xand variance Var Xof X

E(x)=

Var(X)=

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