Question

A shipment of five computers contains two that are defective. If a retailer receives three of these computers at random, list the elements of the sample space S using the letter D and N for detective and non-defective computers, respectively . To each sample point assign a value x of the random variable x representing the number of computers purchased by the retailer which is detective.

Answer 1

$NNN,x=0\\NND,x=1\\NDD,x=2$