SOLUTION: Approximately 70% of all small businesses in Canada have a web site. 10 small businesses were randomly selected to see how many of them have a website. Assume a binomial distributi
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Question 1191084: Approximately 70% of all small businesses in Canada have a web site. 10 small businesses were randomly selected to see how many of them have a website. Assume a binomial distribution for the following questions.
Round all final answers to 3 decimal places.
(a) What is the number of independent trials?
(b) What is the probability of success during one independent trial?
(c) What is the probability that exactly 5 of the businesses will have a website?
(d) What is the probability that at least one of the businesses has a website? Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! 10 independent trials
constant probability of success of 0.7 for each
exactly 5 is 10C5*0.7^5*0.3^5=0.1029=0.103
at least one business is 1- p(0) businesses.
p(0)=0.3^10=0.0000059
so the probability that at least one has a web site is 1.0, rounded from 0.999994
