A fair coin is tossed three ​times, and the events A and B are defined as shown below. Complete parts a through d.   ​A: {At most one head is​ observed} ​B: {The number of heads

Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter14: Counting And Probability
Section14.2: Probability
Problem 4E: Let E and F be events in a sample space S. aThe probability of E and F occurring is...
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A fair coin is tossed
three
​times, and the events A and B are defined as shown below. Complete parts a through
d.
 
​A: {At
most
one
head
is​ observed}
​B: {The number of
heads
observed is
even​}
 
 
 
a. Identify the sample points in the events​ A, B,
A∪​B,
Ac​,
and
A∩B.
 
Identify the sample points in the event A. Choose the correct answer below.
 
 
A.
​A:{HHH, THH, HTH, HHT​}
 
B.
​A:{TTT, HTT, THT, TTH​}
 
C.
​A:{HHT, HTH, THH, TTT​}
 
D.
There are no sample points in the event.
 
Identify the sample points in the event B. Choose the correct answer below.
 
 
A.
​B:{TTT, HTT, THT, TTH​}
 
B.
​B:{HHT, HTH, THH, TTT​}
 
C.
​B:{HHH, THH, HTH, HHT​}
Identify the sample points in the event
A∪B.
Choose the correct answer below.
 
 
A.
A∪​B:{HHH, THH, HTH, HHT​}
 
B.
A∪​B:{HHT, HTH, THH, TTT​}
 
C.
A∪​B:{TTT, HTT, THT, TTH, THH, HTH, HHT​}
 
D.
There are no sample points in the event.
 
Identify the sample points in the event
Ac.
Choose the correct answer below.
 
 
A.
Ac​:{TTT, HTT, THT, TTH​}
 
B.
Ac​:{TTT​}
 
C.
Ac​:{HHH, THH, HTH, HHT​}
 
D.
There are no sample points in the event.
 
Identify the sample points in the event
A∩B.
Choose the correct answer below.
 
 
A.
A∩​B:{TTT, HTT, THT, TTH​}
 
B.
A∩​B:{HHH, THH, HTH, HHT​}
 
C.
A∩B: {TTT}
 
D.
There are no sample points in the event.
 
b. Find​ P(A), P(B),
​P(A∪​B),
PAc​,
and
​P(A∩​B)
by summing the probabilities of the appropriate sample points.
 
​P(A)=enter your response here
​(Type an integer or simplified​ fraction.)
 
 
Find​ P(B).
 
​P(B)=enter your response here
​(Type an integer or simplified​ fraction.)
 
 
Find
​P(A∪​B).
 
​P(A∪​B)=enter your response here
​(Type an integer or simplified​ fraction.)
 
 
Find
PAc.
 
PAc=enter your response here
​(Type an integer or simplified​ fraction.)
 
 
Find
​P(A∩​B).
 
​P(A∩​B)=enter your response here
​(Type an integer or simplified​ fraction.)
 
 
c. Find
​P(A∪​B)
using the additive rule. Compare your answer to the one you obtained in part
b.
​P(A∪​B)=enter your response here
​(Type an integer or simplified​ fraction.)
 
 
Compare your answer to the one you obtained in part
b.
Choose the correct answer below.
 
 
A.
The value of
​P(A∪​B)
calculated using the additive rule is less than
​P(A∪​B)
calculated by summing the probabilities of the sample points.
 
B.
Both calculations of
​P(A∪​B)
produce the same result.
 
C.
​P(A∪​B)
calculated using the additive rule is greater than
​P(A∪​B)
calculated by summing the probabilities of the sample points.
 
d. Are events A and B mutually​ exclusive? Why?
 
 
A.
No​,
events A and B
are not
mutually exclusive because
​P(A∩​B)≠0.
 
B.
Yes​,
events A and B
are
mutually exclusive because
​P(A∩​B)≠0.
 
C.
Yes​,
events A and B
are
mutually exclusive because
​P(A∩​B)=0.
 
D.
No​,
events A and B
are not
mutually exclusive because
​P(A∩​B)=0
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