Let us suppose Christmas lights have a total of 120 bulbs in a set, each with a 99.9% reliability...
Let us suppose Christmas lights have a total of 120 bulbs in a set, each with a 99.9% reliability rating. What is the probability that a set all works?
Homework Answers
Each of the bulb has a reliability rating of 99.9% = 0.999
probability that a set all works = 0.999120 = 0.88686 (Answer)
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