Question

Suppose three test kits are tested at random. Let D represent the defective test kit and let N represent the non-defective test kit. If we let X be the random variable for the number of defective test kits, construct the probability distribution of the random variable X.

Answer 1

Sample space: {DDD, DDN, DND, Ndd, DNN, NDN, NND, NNN}.

X=0, X=1, X=2, X=3