Question

Of the 5050 digital video recorders​ (dvrs) in an inventory are known to be defective. what is the probability you randomly select an item that is not​ defective

Answer 1

There are 4 defective digital video recorders out of 50 digital video recorders. Probability that a video recorder is defective = 4/50 = 2/25 = 0.08. Therefore, probability that a video recorder is not defective = 1 - 4/50 = 46/50 = 23/25 = 0.92