13. a. 1:8 If you toss three coins, what are the odds against them all landing heads up? b. 8:1 C. 7:8 d. 7:1 14. If the odds in favour of event A are 2:3, what is the value of P(A')? a. b. C. d. 15. What are the odds in favour of randomly selecting a red face card from a standard deck of cards? a. 3:13 b. 3:26 C. 3:10 d. 3:23 16. The odds in favour of a runner winning a race in dry weather are 5 to 3. The same runner's odds in favour of winning on a humid day are 7 to 4. Which of the following statements is false? a. The runner has a 62.5% chance of winning in dry weather. b. The runner has a better chance of winning in humid weather. C. The runner has a better chance of winning in dry weather. d. The runner has a 36.4% chance of losing in humid weather. 17. What are the odds against randomly picking a green apple from a fruit bowl containing seven green apples and four red ones? a. 7:4 b. 4:11 c. 7:11 d. 4:7 18. What is the probability of randomly selecting a blue sock from an unorganized sock drawer if the odds against picking a blue sock are 3:7? a. 3 C. 10 d. 10 19. Two dice are rolled and the upper faces are recorded. What are the odds against the sum of the two dice being 3? a. 18:1 b. 1:18 C. 17:1 d. 1:17 20. Two dice are rolled and the upper faces are recorded. What are the odds in favour of both dice showing a 5? a. 35:1 b. 1:35 C. 36:1 d. 1:36