QUESTION 7 Sponsors of a local charity decided to attract wealthy patrons to its $500-aplate dimer by allowing each patron to buy a set of 30 tickets for the gaming tables. The chance of winning a prize for each of the 30 plays is 50-50. If you bought 30 tickets, what is the chance of winning 20 or more prizes? A 0.9786 A 0.027 0 0.021 A 0.049 QUESTION 9 Chances are 80% that a newborn baby will be a girl. For families with ve children, what is the probability that all the children are girls? A 0.9 O 0.3277 ('1 A0 QUESTION 11 Kitti's gasoline station offers 4 cents off per gallon if the customer pays in cash and does not use a credit card. Past evidence indicates that 40% of all customers pay in cash. During a one-hour period, 15 customers buy gasoline at this station. What is the probability that more than 8 and less than 12 customers pay in cash? C\"; 0.210 O 0.212 O 0.092 O 0.562 QUESTION 12 An Economics professor receives an average of ve e-mail messages per day from students. Assume the number of messages approximates a Poisson distribution. What is the probability that on a randomly selected day she will have more than or equal to five messages? 0 0.4405 0 0.875 O 0.5595 O 1.000