Mathematics, 15.04.2020 03:01, rjennis002
The lifetime of a certain lightbulb is a random variable with the expectation of 8000 hours and a standard deviation of 200 hours. What is the probability that the average lifetime of 500 of these light bulbs is less than 8250 hours?
Answers: 1
Mathematics, 21.06.2019 22:00, jladinosolarsee
If tan2a=cot(a+60), find the value of a, where 2a is an acute angle
Answers: 1
The lifetime of a certain lightbulb is a random variable with the expectation of 8000 hours and a st...
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