Suppose that the number of incoming phone calls to a telephone switchboard Poisson distribution with a mean of 1.8 calls per minute. Find the probability that the telephone switchboard will receive (i) at most two incoming phone calls in one minute, (ii) two or three incoming phone calls in 20-second interval.
Suppose that the number of incoming phone calls to a telephone switchboard Poisson distribution with a mean of 1.8 calls per minute. Find the probability that the telephone switchboard will receive (i) at most two incoming phone calls in one minute, (ii) two or three incoming phone calls in 20-second interval.
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
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Transcribed Image Text:Suppose that the number of incoming phone calls to a telephone switchboard follows a
Poisson distribution with a mean of 1.8 calls per minute. Find the probability that the
telephone switchboard will receive
(i)
at most two incoming phone calls in one minute,
(ii)
two or three incoming phone calls in 20-second interval.
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