Question: A new work-processing unit is fully warranted during its first year. The number of warranty service calls (X) for a unit during its first year

A new work-processing unit is fully warranted during its first year. The number of warranty service calls (X) for a unit during its first year is Poisson-distributed with = 4.

a. What is the probability of exactly 2 service calls during the first year?

b. Find the probability of at least 2 calls in the first year.

c. Find the probability of no service calls during the first 6 months.

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