1. Our classroom (MNT 203) is lit partially by fluorescent tubes, each of which fails, on average, after 4000 hours of operation. Since it is costly to have a technician in place toreplace tubes whenever they fail, the management decided to check them for replacementafter 3000 hours. Assuming that we have 300 fluorescent tubes in MNT 203: a. What is the probability that the first tube fails before 1000 hours? b. On average, how many failed tubes will be replaced on 3000 hours replacement check?
1. Our classroom (MNT 203) is lit partially by fluorescent tubes, each of which fails, on average, after 4000 hours of operation. Since it is costly to have a technician in place toreplace tubes whenever they fail, the management decided to check them for replacementafter 3000 hours. Assuming that we have 300 fluorescent tubes in MNT 203: a. What is the probability that the first tube fails before 1000 hours? b. On average, how many failed tubes will be replaced on 3000 hours replacement check?
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.8: Probabilities Of Disjoint And Overlapping Events
Problem 2C
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1. Our classroom (MNT 203) is lit partially by fluorescent tubes, each of which fails, on
average, after 4000 hours of operation. Since it is costly to have a technician in place toreplace tubes whenever they fail, the management decided to check them for replacementafter 3000 hours. Assuming that we have 300 fluorescent tubes in MNT 203:
a. What is the probability that the first tube fails before 1000 hours?
b. On average, how many failed tubes will be replaced on 3000 hours replacement
check?
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