What is the sum of the preceding probabilities

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Patients arrive at the emergency room of Costa Valley Hospital at an average of 5 per day following a Poisson distribution.
a. Compute the probability of exactly 0, 1, 2, 3, 4, and 5 arrivals per day
b. What is the sum of the preceding probabilities, and why is it less than 1.0?

Reference no: EM13178272

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