1) A company employs over 5000 workers of whom 20% are Hispanic 1) A company employs over 5000 workers of whom 20% are Hispanic. If the 20 members of the union executive committee were chosen form the workers, without regard to ethnic background, the number of Hispanics on the committee would have the B ( 20, 0.2) distribution. What is the probability that 4 or fewer members of the committee are Hispanic? 0.6296 B. 0.3819 C. 0.6181 D. 0.3704 E. 0.3999 A

2) Pamela is playing an instant lottery game 2) Pamela is playing an instant lottery game. What is the probability that she will not win until the 8th try if the probability of winning is one out of 100 on a single try? 0.0009 B) 0.0093 C) 0.0993 D) 0.9321 E) 0.9907 B

3) A basketball player has made 66% of his foul shots during the season. Assuming the shots are independent, find the probability that in tonight's game he misses for the first time on his 6th attempt? 0.0426 B) 0.003 C) 0.998 D) 0.0827 E) 0.917 A

4) Stan brings a bag of five different-colored marbles to his multiple-choice statistics test which has possible answers A through E for each question. What is the probability Stan will get at least a 40 percent on the 20-question test if he takes a marble from the bag at random to guess the answer for each question? A) 3% B) 1% C) 15% D) 20% E) 40% A

5) A doctor conducts blood tests on a random sample of 800 white adult men. He finds that 275 have high white blood cell counts. Using the probability that a white adult man with a high white blood cell count contacts leukemia is 0.35, compute the expected number of men in the sample who will contract leukemia. 280 275 179 165 E) 96 E

6) A tennis player makes a successful first serve 48% of the time 6) A tennis player makes a successful first serve 48% of the time. If she serves 8 times, what is the probability that she gets exactly 3 first serves in? Assume that each serve is independent of the others. 0.0042 B) 0.7645 C) 0.2355 D) 0.1275 E) 0.1106 C

7) A test consists of 10 true/false questions 7) A test consists of 10 true/false questions. If a student guesses on each question, what is the probability that the student will answer at least 9 questions correctly? 0.989 B) 0.00098 C) 0.010 D) 0.999 E) 0.0107 E

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