backup generator system
backup generator system
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 Generator,180KW Kohler Power Systems,Standby/Backup US $24,000.00 
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backup generator system Frequently Asked Questions
need help with this geometry?
This question is about airplane generators
Suppose that there are 2 backup systems to the main system for turning the airplane, and all systems operate independantly of each other. The probability of the main system failing in an hour of flight is 0.0002. The probability of the first backup system failing in an hour is .0001
If you want the probability that all three will fail at the same time to be more than .00000000001, what failure probability would be required for the third system
This isn't geometry, it's statistics!
Let p be the required probability.
Then 0.0001 * 0.0002 * p = 0.00000000001
So p = 0.00000000001 / 0.0000002 = 0.00005
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