Judging from recent experience, 5 percent of the computer keyboards produced by an automatic, high-speed machine are defective. If six keyboards are randomly selected, what is the probability that none of the keyboards are defective?
A) 0.001
B) 0.167
C) 0.735
D) 0.500

Question

Quizplus · Accepted Answer

The probability that a single keyboard is not defective is 0.95. For six keyboards, the probability that none are defective is 0.95^6, which is approximately 0.735.

Judging from Recent Experience, 5 Percent of the Computer Keyboards