A First Course in Probability (10th Edition)
10th Edition
ISBN: 9780134753119
Author: Sheldon Ross
Publisher: PEARSON
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Transcribed Image Text:A company surveyed 1000 people on their age and the number of jeans purchased annually. The results of the poll are shown in the table.
Jeans Purchased Annually
3 or More Total
Under 12
50
70
60
180
12-18
16
75
126
43
260
19-25
29
52
122
57
260
over 25
38
50
191
21
300
Total
83
227
509
181
1000
A person is selected at random. Compute the probability of the following.
(a) The person is over 25 and purchases 3 or more pairs of jeans annually.
(b) The person is in the age group 12-18 and purchases at most 2 pairs of jeans annually.
(c) The person is in the age group 19-25 or purchases no jeans annually.
(d) The person is older than 18 or purchases exactly 1 pair of jeans annually.
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