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Ch. 5 Probability
5.1 Probability Rules
1 Understand the Rules of Probability
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) Which of the following cannot be a probability?
A)

85
B) 0
C) 0.001
D)
2
3
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
2) Identify the sample space of the probability experiment: tossing a coin
3) Identify the sample space of the probability experiment: answering a true or false question
4) Identify the sample space of the probability experiment: tossing four coins and recording the number of heads
5) Identify the sample space of the probability experiment: answering a multiple choice question with A, B, C, and
D as the possible answers
6) Identify the sample space of the probability experiment: determining the children
ʹ
s gender for a family of three
children (Use B for boy and G for girl.)
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
7) Which of the following probabilities for the sample points A, B, and C could be true if A, B, and C are the only
sample points in an experiment?
A) P(A)
=
0, P(B)
=
1/14, P(C)
=
13/14
B) P(A)
=
1/8, P(B)
=
1/7, P(C)
=
1/10
C) P(A)
= 
1/4, P(B)
=
1/2, P(C)
=
3/4
D) P(A)
=
1/4, P(B)
=
1/4, P(C)
=
1/4
8) If sample points A, B, C, and D, are the only possible outcomes of an experiment, find the probability of D
using the table below.
Sample Point
A
B
C
D
Probability
1/11
1/11
1/11
.
A) 8/11
B) 1/11
C) 1/4
D) 3/11
TRUE/FALSE. Write
ʹ
T
ʹ
if the statement is true and
ʹ
F
ʹ
if the statement is false.
9) The probability that event A will occur is
P(A)
=
Number of successful outcomes
Number of unsuccessful outcomes
10) The probability that event A will occur is
P(A)
=
Number of successful outcomes
Total number of all possible outcomes
Page 126
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View Full DocumentMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
11) In terms of probability, a(n) ___________________

is any process with uncertain results that can be repeated.
A) Experiment
B) Sample space
C) Event
D) Outcome
12) A(n) _______________ of a probability experiment is the collection of all outcomes possible.
A) Sample space
B) Event set
C) Bernoulli space
D) Prediction set
13) True or False: An outcome is any collection of events from a probability experiment.
A) True
B) False
14) In a 1

pond bag of skittles the possible colors were red, green, yellow, orange, and purple. The probability of
drawing a particular color from that bag is given below. Is this a probability model? Answer Yes or No.
Color
Probability
Red
0.2299
Green
0.1908
Orange
0.2168
Yellow
0.1889
Purple
0.1816
A) Yes
B) No
15) A bag contains 25 wooden beads. The colors of the beads are red, blue, white, green, black, brown, and grey.
The probability of randomly selecting a bead of a particular color from the bag is given in the below table. Is
this a probability mode? Answer yes or No.
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