Question

find the mean.

1. in a certain town, 20 percent of voters are in favor of a given ballot measure and 80 percent are opposed. for groups of 120 voters, find the mean for the number who oppose the measure.

a) 20 b) 80 c) 96 d) 24
counting.

1. there are 6 members on a board of directors. if they must elect a chairperson, a secretary, and a treasurer, how many different slates of candidates are possible?

a) 20 b) 120 c) 216 d) 720
find the indicated probability for problem 27 to problem 40.

1. find p(a), given that p(\overline{a}) = 0.318

a) 1.318 b) 99.682 c) 0 d) 0.682

1. in a certain class of students, there are 11 boys from wilmette, 4 girls from winnetka, 7 girls from wilmette, 4 boys from glencoe, 5 boys from winnetka and 4 girls from glencoe. if the teacher calls upon a student to answer a question, what is the probability that the student will be a boy?

a) 0.314 b) 0.429 c) 0.71 d) 0.571

1. the table below describes the smoking habits of a group of asthma sufferers.

	nonsmoker	light smoker	heavy smoker	total
women	446	35	44	525
total	836	69	86	991

if two different people are randomly selected from the 991 subjects, find the probability that they are both heavy - smokers. round to six decimal places.
a) 0.007451 b) 0.001796 c) 0.007531 d) 0.0001352

1. the table below describes the smoking habits of a group of asthma sufferers.

	nonsmoker	occasional smoker	regular smoker	heavy smoker	total
women	382	48	86	39	555
total	813	98	157	88	1156

if one of the 1156 people is randomly selected, find the probability that the person is a woman or a heavy smoker.
a) 0.596 b) 0.522 c) 0.554 d) 0.511

1. a card is drawn from a well - shuffled deck of 52 cards. find p(drawing a face card or a 4).

a) \frac{4}{13} b) \frac{12}{13} c) 16 d) \frac{2}{13}

1. you are dealt two cards successively (without replacement) from a shuffled deck of 52 playing cards. find the probability that the first card is a king and the second card is a queen. express your answer as a simplified fraction.

a) \frac{4}{663} b) \frac{1}{663} c) \frac{2}{13} d) \frac{13}{102}

Explanation:

Answer:

(25) C. 96
(26) D. 720
(27) D. 0.682
(28) B. 0.429
(29) C. 0.007531
(30) C. 0.554
(31) B. $\frac{12}{13}$
(32) A. $\frac{4}{663}$