Question: A discrete random variable X models the number of empty car bays in a certain staff carpark at 1 0 am on a Monday. From

A discrete random variable X models the number of empty car bays in a certain staff
carpark at 10am on a Monday. From past experience we know PX(X <=1)=0.8 and
PX(X >=1)=0.4. Which of the following must be true?

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