Question

A shipment of five computers contains two that are slightly defective. If a retailer receives three of these computers at random,let Z represent the number of computer purchased by the retailer which are slightly defective

Answer 1

As there are two computers of five that are slightly defective, the number of defective computers Z among the three purchased ones, can take on values 0, 1, 2 (there are 5 - 2 = 3 non-defective computers).