Questions 18-21. A random sample of 199 UI students in Fall 2019 shows that 89 of the Students live within one mile of campus and typically attend at least one party a week, 45 of the students do not live within one mile of campus and do not typically attend at least one party a week, and 111 of the students live within one mile of campus. 18. What is the probability that a student lives within one mile of campus? (a) 0.447 (b) 0.801 (c) 0.405 (d) 0.453 (e) None of the answers is correct to the third decimal place. 19. What is the probability that a student does not live within one mile of campus but typically attends at least one party a week? (a) 0.226 (b) 0.405 (c) 0.483 (d) 0.216 (e) None of the answers is correct to the third decimal place. 20. Now consider only those students who live within one mile of campus. What is the probability that such a student typically attends at least one party a week? (a) 0.46 (b) 0.45 (c) 0.41 (d) 0.80 (e) None of the answers is correct to the second decimal place