Exam (elaborations) MATH 399 Week 5 Quiz with answers

1. For the given pair of events, classify the two events as independent or dependent. Randomly selecting a city in Texas Randomly selecting a county in Texas Choose the correct answer below. o A. The two events are dependent because the occurrence of one does not affect the probability of the occurrence of the other. o B. The two events are dependent because the occurrence of one affects the probability of the occurrence of the other. o C. The two events are independent because the occurrence of one does not affect the probability of the occurrence of the other. o D. The two events are independent because the occurrence of one affects the probability of the occurrence of the other. 10: 3.2.9 2. 24% of college students say they use credit cards because of the rewards program. You randomly select 10 college students and ask each to name the reason he or she uses credit cards. Find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two, and (c) between two and five inclusive. If convenient, use technology to find the probabilities. (a) P(2)= (Round to the nearest thousandth as needed.) (b) P(x > 2) = (Round to the nearest thousandth as needed.) (c) P(2:sx:S5)= (Round to the nearest thousandth as needed.) 10: 4.2.2