a) Suppose that Game store in Cape Town donated a lot of 8 computer sets that  includes 3 which are malfunctioning or defective. If 4 of this computer sets are  chosen at random for delivery to a school. i) What will be the probability mass function of a random variable ??  ii) What will be the expected value of

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a) Suppose that Game store in Cape Town donated a lot of 8 computer sets that 
includes 3 which are malfunctioning or defective. If 4 of this computer sets are 
chosen at random for delivery to a school.
i) What will be the probability mass function of a random variable ?? 
ii) What will be the expected value of ??

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