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?

0.7351

Step-by-step explanation:

We use Binomial distribution here , where the probability of getting x successes in n-trials is given by :-

, p= Probability of getting success in each trial.

As per given , the proportion of computer keyboards produced by an automatic, high-speed machine are defective : p=0.05

n=6

Let x be the number of defective keyboards.

The probability that none of the keyboards are defective will be :

Hence, the probability that none of the keyboards are defective is probability that none of the keyboards are defective is 0.7351 .

question: how many people can she serve?

answer: she can serve 16.66666667 people. so she can only give 16 people a complete serving.

question: does she have enough ice cream for her guests?

answer: no. explanation: she only has enough for 16 people to have a full serving. however, she can give a 17th person a partial serving.

0.50 , 0.75

step-by-step explanation: