SOLUTION: Suppose there is an average of 2 suicides per year per 50 000 population. In a city of 100 000 people, find the probability that: (a)not less that 3 suicides in two years.0 suic

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Question 1034165: Suppose there is an average of 2 suicides per year per 50 000 population. In a city of 100 000 people, find the probability that:
(a)not less that 3 suicides in two years.0 suicide per year.
(b)0 suicide per year.

Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
The r.v. X = # of suicides in a year, follows the Poisson distribution, with pmf p%28x%29+=+%28%28lambda%29%5Ex%2F%28x%21%29%29e%5E%28-%28lambda%29%29, and lambda+=+2%2A%28100000%2F50000%29+=+4.
(a) , to three significant figures.
(b) p%28x=0%29+=+p%280%29+=+%284%5E0%2F%280%21%29%29e%5E-4++=+0.01832, to four significant figures.