- 3. If A = {1,2,3,4} and B = {4, 5, 6, 7} then A u B should be A. {1, 2, 3, 5, 6, 7) B.{4} C. {1, 2, 3, 4, 5, 6, 7) D. (2. 4. If A = {(H,H). (H,T)} is the event that the first coin lands heads and B = {( HT). (T.T)) the second coin lands tails, then AB should be A. {(H,H)} B. {(H,T)} C. {(T.T)) D (H 5. The local weather forecaster said that there is a 40% chance of rain tomorrow. What is that it will not rain tomorrow? A. 0.4 B. 0.6 C. 40 D. 60 For numbers 6 to 9, use the following situation: "The manager of Dahilayan Adventure Park is round of mini golf for each person today. He is hoping that people will then also purchase ticket karts and/or laser tag. He keeps track of the customers and finds that of the following 50 people mini-golf.​