SOLUTION: Find the probability that none of the 3 bulbs in a signal-light will have to be replaced during the first 1200 hours of operation if the lifetime X of the bulb is a random variable

Question 364982: Find the probability that none of the 3 bulbs in a signal-light will have to be replaced during the first 1200 hours of operation if the lifetime X of the bulb is a random variable with the density f(x)=6[0.25-(x-1.5)^2] when 1<=x<=2, and f(x)=0 otherwise, where x is measured in multiples of 1000 hours.
Please show work if you know the aswer. =)
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
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