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Consider a bank with two tellers. Three people, Alice, Bella, and Catalina enter the bank at...

Consider a bank with two tellers. Three people, Alice, Bella, and Catalina enter the bank at almost the same time and in that order. Alice and Bella go directly into service, while Catalina waits for the first available teller. Suppose that the service times for each customer are exponentially distributed with mean 4 minutes. What is the expected total amount of time for Catalina to complete her business?

Math   Statistics-And-Probability   
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