Probability Exam Worksheet With Answer Key - Math 211, Eastern Mediterranean University Page 18
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34110) A group of students were asked if they carry a credit card. The responses are listed in the table.
110)
Credit Card
Not a Credit Card
Class
Carrier
Carrier
Total
Freshman
11
49
60
Sophomore
16
24
40
Total
27
73
100
If a student is selected at random, find the probability that he or she is a sophomore and owns a
credit card. Round your answers to three decimal places.
A) 0.593
B) 0.675
C) 0.407
D) 0.160
111) A group of students were asked if they carry a credit card. The responses are listed in the table.
111)
Credit Card
Not a Credit Card
Class
Carrier
Carrier
Total
Freshman
45
15
60
Sophomore
32
8
40
Total
77
23
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) 0.250
B) 0.450
C) 0.750
D) 0.584
112) A group of students were asked if they carry a credit card. The responses are listed in the table.
112)
Credit Card
Not a Credit Card
Class
Carrier
Carrier
Total
Freshman
17
43
60
Sophomore
28
12
40
Total
45
55
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) 0.622
B) 0.280
C) 0.700
D) 0.300
113) A group of students were asked if they carry a credit card. The responses are listed in the table.
113)
Credit Card
Not a Credit Card
Class
Carrier
Carrier
Total
Freshman
23
37
60
Sophomore
31
9
40
Total
54
46
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) 0.383
B) 0.426
C) 0.230
D) 0.574
18
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