An old-fashioned string of Christmas tree lights has 10 bulbs connected in series. The 10 identical bulbs are assumed to have independent times-to-failure with constant failure rate λ. Determine λ per week such that the probability that the string survives 3 weeks is at least 99%.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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An old-fashioned string of Christmas tree lights has 10 bulbs connected in series. The 10 identical bulbs are assumed to have independent times-to-failure with constant failure rate λ. Determine λ per week such that the probability that the string survives 3 weeks is at least 99%.

 

remember be careful it is assumed to have independent times-to-failure with constant failure rate lambda. Also we want to know each week not for 3 weeks.

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