You are the only bank teller on duty and you want to take a break for 10 minutes but you don't want to miss any customers. Suppose the arrival of customers can be models by a Poisson distribution with mean of 2 customers per hour. What's the probability that 2 or more people arrive in the next 10 minutes?
a. 0.0446 b. 0.2388 c. 0.2266 d. 0.7166