Question

n at least According to th Humane Society of the United States, there are approximately 77.5 million o ned dogs in the United States, and approximately 40% of all US households o one d09-t Suppose that the 40% figure is correct and that 15 households are randomly selected for a pet ownership survey. (a) What is the probablity that exactly eight of the households have at least one dog? (Round your answer to three decimal places.) (b) What is the probability that at most three of the households have at least one dog? (Round your answer to three decimal places.) (e) What is the probability that more than 10 households have at least one dog? (Round your answer to three decimal places.) You may need to use the appropriate appendix table or technology to answer this question.

Answer 1

15 以 -0. 0005 2. iS Li LS Lo og = 0-1859 6.6' =0.2016 4° て0.0245 9907 0.0093- o-009