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Sir i am stuck for this question (a) The following table gives the probability distribution of a random variable X 0 1 2 -2 P(X

Sir i am stuck for this question

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(a) The following table gives the probability distribution of a random variable X 0 1 2 -2 P(X = =) a b 0.2 0.1 Assume the mean value of this distribution is E(X ) = 0.5. (i) Find the values of a and b; [4 marks] (ii) Furthermore, find the variance of this distribution Var(X). [4 marks]

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