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A sales form receives on the average of 3 calls per hour

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Question from Poisson probability distribution

7. A sales form receives on the average of 3 calls per hour on its toll-free number. For any given hour, find the probability that it will receive a. At most 3 calls; b. At least 3 calls; and c. Five or more calls.

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i sixsigma

i sixsigma Added an answer on Mar 21,2023

It's true that this is a question from Poisson's probability distribution.

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This follows a poisson Distribution
Average =	3
Atmost 3 Calls	=	p(x<=3)
p(x<=3)		0.6472
b) At least 3 calls:	=	1-P(x<=2)
p(x>=3)	=	0.57681
c. Probability of 5 or more calls	=	1-P(x<=4)
p(x>=5)	=	0.1847

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A sales form receives on the average of 3 calls per hour

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