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Answer (Choose 1 answer)
The number of telephone calls that arrive at a phone exchange is often modeled as a Poisson random variable. Assume that on average there are 12 calls per hour. What is the probability that there are exactly 5 calls in one hour (rounded to 4 decimal places)?
A. 0.4661
B. 0.0211
C. 0.0127
D. 0.0345
