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LED light bulbs have an expected life that is exponentially distributed with a mean of 5,000...

LED light bulbs have an expected life that is exponentially distributed with a mean of 5,000 hours. Determine the probability that one these lights will last:

a- -  At least 6,000 hours

b- - No longer than 1,000 hours

c- - Between 1,000 and 6,000 hours

Math   Statistics-And-Probability   
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