Judging from recent experience,5% 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 of choosing a non-defective keyboard is 1 - 0.05 = 0.95. Since we are selecting six keyboards independently, the probability of all of them being non-defective is:

0.95 * 0.95 * 0.95 * 0.95 * 0.95 * 0.95 = 0.735

Therefore, the answer is (C) 0.735.

Judging from Recent Experience,5% of the Computer Keyboards Produced by an Automatic,high-Speed