# Question

Tomoko Arakawa, a clerk at the Department of Motor Vehicles, processes customers at an average rate of 6 per hour (λ = 6 customers per hour). Assume all the Poisson conditions regarding independence, etc., are met. How likely is it that a randomly selected customer will take?

a. At least 15 minutes (1/4 hour) to process?

b. No more than 20 minutes (1/3 hour) to process?

c. Between 10 and 15 minutes to process?

a. At least 15 minutes (1/4 hour) to process?

b. No more than 20 minutes (1/3 hour) to process?

c. Between 10 and 15 minutes to process?

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