SOLUTION: a sales firm receives an average of four calls per hour on its toll free number for any given hour find the probability that it will recieve exactly nine calls use the poisson dist

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Question 368125: a sales firm receives an average of four calls per hour on its toll free number for any given hour find the probability that it will recieve exactly nine calls use the poisson distribution
Answer by robertb(4012) About Me  (Show Source):
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Using the poisson distribution, the probability that it will recieve exactly 9 calls IN AN HOUR is given by P%289%29+=+e%5E-4%2A%284%5E9%2F9%21%29+=+0.0132312