Question: Question Two: a) By citing an example in each case, Distinguish between a probability mass function (p.m.f) and a probability density function (p.d.f) (4 marks)

Question Two: a) By citing an example in each case, Distinguish between a probability mass function (p.m.f) and a probability density function (p.d.f) (4 marks) b) A shipment of 20 similar laptop computers to a retail outlet contains three that are defective. If a school makes random purchases of three of these computers, find the probability distribution for the number of defectives. (4 marks)

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