The scheduling manager of an electricity supply company knows that the number of emergency calls follows a Poisson distribution with an average of 7 calls per week (7 days) What is the probability that the company will receive exactly 2 emergency calls during a specified week? A 0.030 B 0.970 С 0.023 D 0.993 What is the probability that there will be at least four emergency calls on a given day? А 0.173 B 0.918 С 0.996 D 0.019

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