SOLUTION: An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of two non-work-related e-mails per hour. Assume the arri

Question 971893: An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of two non-work-related e-mails per hour. Assume the arrival of these e-mails is approximated by the Poisson distribution.
a. What is the probability Linda Lahey, company president, received exactly one non-work-related e-mail between 4 p.m. and 5 p.m. yesterday?
b. What is the probability she received five or more non-work-related e-mails during the same period?
c. What is the probability she did not receive any non-work-related e-mails during the period?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
Poisson with lambda=2
Probability of 1 is 0.2707 from table or e(-2) (2)^1
Probability of 0 is e(-2)=0.1354
probability of ≥5 is 0.0166 from table.

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