SOLUTION: Between the hours of 2 and 4pm the average number of phone calls per minute coming into the switch-board of a company is 2.5.Find the probability that during one particular minute

Question 924374: Between the hours of 2 and 4pm the average number of phone calls per minute coming into the switch-board of a company is 2.5.Find the probability that during one particular minute there will be A.2 B.3 C.4 phone calls.
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
Between the hours of 2 and 4pm, avg/min = 2.5
Using a TI calculator 0r similarly a Casio fx-115 ES plus
P(x = 2pmin) = poissonpdf(2.5,2) = .2565
P(x = 3pmin) = poissonpdf(2.5,3) = .2138
P(x = 4pmin) = poissonpdf(2.5,4)= .1336
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