Nineteen of the 100 digital video recorders DVRs in an inven

Nineteen of the 100 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?

The probability is ____

(Simplify your answer.)

Solution

The probability of defective is 19/100=0.19

So the probability is

1-0.19=0.81