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(a) A type of light bulb is labeled as having an average lifetime of 100 hrs. It is reasonable to model the probability of failure

(a) A type of light bulb is labeled as having an average lifetime of 100 hrs. It is reasonable to model the probability of failure of these bulbs by exponential density function with mean = 1000. Use this model to find the probability that a bulb (i) Fails within the first 200 hours. (ii) Burns for more than 800 hours. (ii) What is the median lifetime of these bulbs

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