The probability that none of the three bulbs in a set of traffic lights will have to be replaced during the first 1200 hours of operation if the lifetime X of a bulb

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.8: Probability
Problem 19E
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The probability that none of the three bulbs in a set of traffic lights will have to
be replaced during the first 1200 hours of operation if the lifetime X of a bulb
(in thousands of hours) is a random variable with probability density function
f(x) = 6[0.25- (x- 1.5) ] when 1 Sxs2 and f(x) 0 otherwise is
O 0.7393
0.8960
O 0.8860
O 0.7282
O Other:
Transcribed Image Text:The probability that none of the three bulbs in a set of traffic lights will have to be replaced during the first 1200 hours of operation if the lifetime X of a bulb (in thousands of hours) is a random variable with probability density function f(x) = 6[0.25- (x- 1.5) ] when 1 Sxs2 and f(x) 0 otherwise is O 0.7393 0.8960 O 0.8860 O 0.7282 O Other:
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