Alaska National Bank is trying to decide how many drive-in teller windows to open on a busy

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Alaska National Bank is trying to decide how many drive-in teller windows to open on a busy Saturday.

CEO Ted Eschenbach estimates that customers arrive at a rate of about l 5 18 per hour, and that each teller can service about m 5 20 customers per hour.

APPROACH c Ted decides to use Table D.5 to compute Lq and Wq.

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