Question: There are two librarians at a downtown library that help checking out books or answer questions. The customers reach out the librarians at rate of

There are two librarians at a downtown library that help checking out books or answer questions. The customers reach out the librarians at rate of 12 customers per hour and wait in one of two lines for the helps. It takes the librarians an average of one minute to scan the library card, the books, and provide a receipt (exponential distribution). What are There are two librarians at a downtown library , m, and s?

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