Posted by **Michael ** on Friday, September 30, 2011 at 7:12pm.

Suppose that the number of accidents occurring in an industrial plant is described by a Poisson process with an average of 1.5 accidents every three months. During the last three months, four accidents occurred.

(a)probability that no more than 12 accidents will occur during a particular year.

(b)probability that no accidents will occur during a particular year.

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