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Do Homework- Sabrina Comas- Google Chrome umSecurehttps/www.mathvd.com/Student /PlayerHomework aspthomeworkld-4597074iquestionlds-6kfluhed-fakeladd 4847304&kcenterwinay; Introduction to Probability and Statistics (1) Sabrina Comas 1 1/16/18 11:08 PM Home ork: HW 9 Score: 0.25 of 1 pt 6018(8 complete) Scorer 90 63%, 725 of 8 pt 5.2.27-T Question Help * Based on a poll, 60% of adults believe in reincarnation. Assume that 8 adults are randomly selected, and ind he indiae probablly below a. What is the probability that exactly 7 of the selected adults believe in reincarnation? The probability that exactly 7 of the 8 adults believe in reincarnation is 090 (Round to three decimal places as needed) b. What is the probability that all of the selected adults believe in reincarnation? The probability that all of the selected adults believe in reincamation is 017 (Round to three decimal places as needed) c. What is the probability that at least 7 of the selected adults believe in reincarnation? The probability that at least 7 of the selected adults believe in reincarnation is (Round to three decimal places as needed.) ry Enter your answer in the answer box and then click Check Answer remaining

Explanation / Answer

All params of binomial distribution have been given in the question. If you have any doubts please write back to me:

p = .60

n = 8

a. P(X=7) = nCr (p^x)(1-p)^n-x = 8C7(.6^7)(.4^1) = .08958 = .090 ( rounded off to 3 digits)

b. P(all believed in rein) = P(X=8) =1*(0.6^8)*(0.4^0) = 0.0168 = 0.017

c. P(X>=7) =(P(X=7)+P(X=8)) = (.08958+0.1344) = 0.224

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