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Elementary,Middle School,High School,College,University,PHD
| Teaching Since: | May 2017 |
| Last Sign in: | 406 Weeks Ago, 2 Days Ago |
| Questions Answered: | 66690 |
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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
The lifetime (in hours) of a light bulb manufactured by a certain company is a random variable with probability density function 0 if
 
Suppose that, for all nonnegative real numbers a and b, the event that any light bulb lasts at least a hours is independent of the event that any other light bulb lasts at least b hours. Find the probability that, of six such light bulbs selected at random, exactly two last over 1000 hours.
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