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Please assist with question 3 for my business statistics assignment. Question 3 The table below shows the probability distribution for a discrete random variable X.

Please assist with question 3 for my business statistics assignment.

Question 3 The table below shows the probability distribution for a discrete random variable X. X 0 2 4 5 P(X=x) 0.15 0.20 0.30 0.10 a. State the value of z. (2 mark) b. Calculate the expected value, E (x). (3 marks) Calculate the variance, Var(x)

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