Suppose the time a student takes on an exam can be modeled by a Poisson process with a mean of 20 questions per hour Let X denote the number of questions completed.
A)What is the probability of a student finishing exactly 18 questions in the next hour?
B)What is the probability of a student finishing exactly 12 questions in 30 minutes?
C) What is the probability of finishing at least 1 question in the next minute?
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