Multiple Choice Answers

Question 1
A collection of possible outcomes is know as a(n):
A. experiment.
B. probability.
C. event.
D. observation
Question 2
__________ requires the evaluation of available opinions and other information to produce estimates.
A. An experiment
B. An observation
C. Classical probability
D. Subjective probability

Question 3
The probability of selecting a red card from a fair deck of cards is:
A. a collectively exhaustive experiment.
B. an example of a mutually exclusive event.
C. an example of classical probability.
D. All of the above

Question 4
Events A and B are mutually exclusive. The probability of event A occurring is 0.15; the probability of event B occurring is 0.45. What is the probability that A or B will occur?
A. 0.30
B. 0.60
C. 1
D. 0.40

Question 5
Of 680 college students surveyed, 540 reported that they held a part-time job. What is the probability of selecting a student with a part-time job from this group?
A. 0.206
B. 0.485
C. 0.50
D. 0.794

Question 6
Please answer questions 6-8 based on the following information.
A student survey revealed the following data concerning employment status:
Class Level/Job status None Part-time Full-time
Freshman 16 52 12
Sophomore 4 26 20
Junior 8 18 34
Senoir  22 18
If one student is selected at random, what is the probability that the selected person is currently unemployed?
A. 0.122
B. 0.138
C. 0.348
D. 0.878

Question 7
Based on the information in the chart in #6 (above), if one student is selected at random, what is the probability that the selected person is a senior working full-time?
A. 0.078
B. 0.082
C. 0.214
D. 0.461

Question 8
Based on the information in the chart in #6 (above), if one student is selected at random, what is the probability that the selected person is a freshman employed on a part-time basis?
A. 0.104
B. 0.226
C. 0.356
D. 0.441

Question 9
P(A) = 0.40; P(B) = 0.25; the probability of both events occurring is 0.15. What is the probability of either event occurring?
A. 0.15
B. 0.50
C. 0.65
D. 0.80

Question 10
What is the probability of obtaining a “1” or a “2” on a single throw of a fair die?
A. 0.028
B. 0.167
C. 0.333
D. 0.50