Question

Suppose 3 bulbs are selected at random from a lot. Each bulb is tested and classified as defective (D) or non-defective (N). Write the sample space of this experiment?

Answer 1

Let defective bulb be denoted by D and non - defective bulb be denoted by N.
so the sample space when 3 bulbs are selected at random from a lot is given by
$S=\{DDD,DDN,DND,NDD,DNN,NDN,NND,NNN\}$