Probability Exam Worksheet With Answer Key - Math 211, Eastern Mediterranean University Page 17
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34106) A group of students were asked if they carry a credit card. The responses are listed in the table.
106)
Credit Card
Not a Credit Card
Class
Carrier
Carrier
Total
Freshman
45
15
60
Sophomore
5
35
40
Total
50
50
100
If a student is selected at random, find the probability that he or she owns a credit card given that
the student is a freshman. Round your answer to three decimal places.
A) 0.450
B) 0.250
C) 0.900
D) 0.750
107) A group of students were asked if they carry a credit card. The responses are listed in the table.
107)
Credit Card
Not a Credit Card
Class
Carrier
Carrier
Total
Freshman
18
42
60
Sophomore
11
29
40
Total
29
71
100
If a student is selected at random, find the probability that he or she owns a credit card given that
the student is a sophomore. Round your answer to three decimal places.
A) 0.110
B) 0.379
C) 0.275
D) 0.725
108) A group of students were asked if they carry a credit card. The responses are listed in the table.
108)
Credit Card
Not a Credit Card
Class
Carrier
Carrier
Total
Freshman
14
46
60
Sophomore
32
8
40
Total
46
54
100
If a student is selected at random, find the probability that he or she is a freshman given that the
student owns a credit card. Round your answers to three decimal places.
A) 0.304
B) 0.233
C) 0.140
D) 0.696
109) A group of students were asked if they carry a credit card. The responses are listed in the table.
109)
Credit Card
Not a Credit Card
Class
Carrier
Carrier
Total
Freshman
23
37
60
Sophomore
8
32
40
Total
31
69
100
If a student is selected at random, find the probability that he or she is a sophomore given that the
student owns a credit card. Round your answers to three decimal places.
A) 0.080
B) 0.742
C) 0.775
D) 0.258
17
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