Mathematics, 19.12.2019 04:31, jnannsbwnw4216
Twenty-five heat lamps are connected in a greenhouse so that when one lamp fails, another takes over immediately. (only one lamp is turned on at any time.) the lamps operate independently, and the lifetime of each has a mean 50 hours and a standard deviation of 4 hours.
if the greenhouse is not checked for 1,300 hours after the lamp system is turned on, what is the probability that a lamp will be burning at the end of the 1,300-hour period?
Answers: 2
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