A certain factory operates three different shifts. Over the last year, 200 accidents have occurred at the factory. Some of these can be attributed at least in part to unsafe working conditions, whereas the others are unrelated to working conditions. The accompanying table gives the percentage of accidents falling in each type of accident-shift category. Day Shift Swing Night Unsafe Unrelated Conditions to Conditions 13% 8% 2% 30% 14% 33% Suppose one of the 200 accident reports is randomly selected from a file of reports, and the shift and type of accident are determined. (a) What are the simple events? (Let S₁, S₂, and S3 represent the day, swing, and night shifts, respectively. Let C₁ and C₂ represent the unsafe conditions and unrelated to conditions, respectively. Enter your answer in set notation.) (b) What is the probability that the selected accident was attributed to unsafe conditions? (c) What is the probability that the selected accident did not occur on the day shift?

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter12: Probability
Section12.3: Conditional Probability; Independent Events; Bayes' Theorem
Problem 82E
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A certain factory operates three different shifts. Over the last year, 200 accidents have occurred at the factory. Some of these can be attributed at least in part to unsafe working conditions,
whereas the others are unrelated to working conditions. The accompanying table gives the percentage of accidents falling in each type of accident-shift category.
Day
Shift Swing
Night
Unsafe Unrelated
Conditions to Conditions
13%
8%
2%
30%
14%
33%
Suppose one of the 200 accident reports is randomly selected from a file of reports, and the shift and type of accident are determined.
(a) What are the simple events? (Let S₁, S₂, and S3 represent the day, swing, and night shifts, respectively. Let C₁ and C₂ represent the unsafe conditions and unrelated to conditions,
respectively. Enter your answer in set notation.)
(b) What is the probability that the selected accident was attributed to unsafe conditions?
(c) What is the probability that the selected accident did not occur on the day shift?
Transcribed Image Text:A certain factory operates three different shifts. Over the last year, 200 accidents have occurred at the factory. Some of these can be attributed at least in part to unsafe working conditions, whereas the others are unrelated to working conditions. The accompanying table gives the percentage of accidents falling in each type of accident-shift category. Day Shift Swing Night Unsafe Unrelated Conditions to Conditions 13% 8% 2% 30% 14% 33% Suppose one of the 200 accident reports is randomly selected from a file of reports, and the shift and type of accident are determined. (a) What are the simple events? (Let S₁, S₂, and S3 represent the day, swing, and night shifts, respectively. Let C₁ and C₂ represent the unsafe conditions and unrelated to conditions, respectively. Enter your answer in set notation.) (b) What is the probability that the selected accident was attributed to unsafe conditions? (c) What is the probability that the selected accident did not occur on the day shift?
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