Question: The random variable X has the following distribution: x 1 2 3 P(X = x) a b a where a and b are constants. a

The random variable X has the following distribution: x 1 2 3 P(X = x) a b a where a and b are constants. a Write down E(X). b Given that Var(X) = 0.75, find the values of a and b.

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