A recent survey showed that 5 percent of the computer keyboa

A recent survey showed that 5 percent of the computer keyboards produced by a particular company are defective. What is the probability that out of eight keyboards selected at random, exactly zero keyboards will be defective?

Solution

The probability that out of eight keyboards selected at random, exactly zero keyboards will be defective is:

8C0*0.05^0*(1-0.05)^8

=0.663