6. A discrete random variable X models the number of empty car bays in a certain staff carpark at loam on a Monday. From past experience we know Px(X S 1) 0.8 and Px(X 2 1) = 0.4. Which of the following must be true? Px(X > 1) < 0.2 Px(X = 0) = 0.6 Px(X < 1) = 0.5 X must follow a Binomial Distribution. [3 marks]