The lifespan of the lightbulb in your bedroom follows an exponential distribution with a mean of...
The lifespan of the lightbulb in your bedroom follows an exponential distribution with a mean of ½ years. What is the expected number of lightbulbs to be burnt out in two years?
Homework Answers
Mean = 1/2 years
So expected number of bulbs burnt in an year = 1/(1/2) = 2
Hence,
Expected number of lightbulbs to be burnt out in two years = 2*2 = 4
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