9. $S=$ {(Wendy’s, McDonald’s, Burger King), (Wendy’s, Burger King, McDonald’s), (McDonald’s, Wendy’s, Burger King), (McDonald’s, Burger King, Wendy’s), (Burger King, Wendy’s, McDonald’s), (Burger King, McDonald’s, Wendy’s,)}

11. $S=$ {{Thriller, The Wall}, {Thriller, Eagles: Their Greatest Hits}, {Thriller, Led Zeppelin IV}, {The Wall, Eagles: Their Greatest Hits}, {The Wall, Led Zeppelin IV}, {Eagles: Their Greatest Hits, Led Zeppelin IV}}

13. $S=$ {(white, male), (white, female), (African American, male), (African American, female), (Native American, male), (Native American, female), (Asian, male), (Asian, female), (other, male), (other, female), (multiracial, male), (multiracial, female)}

15. 0

17. 1

19. experimental

21. theoretical

23. experimental

25. theoretical

27. experimental

29. An event that is very likely to happen has probability 0.999.

An event that will surely happen has probability 1.

An event that is a rare event has probability 0.001.

An event that may or may not happen has probability 0.5.

An event that will never happen has probability 0.

31. ${\displaystyle \frac{1}{3}}$

33. ${\displaystyle \frac{1}{3}}$

35. ${\displaystyle \frac{1}{2}}$

37. ${\displaystyle \frac{1}{13}}$

39. ${\displaystyle \frac{1}{4}}$

41. ${\displaystyle \frac{3}{13}}$

43. ${\displaystyle \frac{1}{10}}$

45. ${\displaystyle \frac{1}{10}}$

47. ${\displaystyle \frac{1}{2}}$