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Bumek [7]
3 years ago
9

The number of major faults on a randomly chosen 1 km stretch of highway has a Poisson distribution with mean 1.7. The random var

iable X is the distance (in km) between two successive major faults on the highway.
What is the probability you must travel more than 3 km before encountering the next four major faults?
Mathematics
1 answer:
tiny-mole [99]3 years ago
6 0
The probability can be modeled using the following formula:
P(X =3)
wherein X follows the density 
P(X=k)=\frac{1.7^ke^{-1.7}}{k!}
Now for k = 3 we get:
P(X=3)=\frac{1.7^3e^{-1.7}}{3!}=0.15
The probability we are looking for is 0.15.
Do you have any question ? 
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