Question 3 A single Automated Teller Machine (ATM) is located on the ground floor of a popular shopping mall. Service time at this machine is exponentially distributed. On average, the ATM machine can serve a customer in 3 minutes. Customer arrivals at the machine are Poisson distributed, with an average of 15 customers an hour. Relevant formulas to analyze this M/M/1 model are available in your textbook. On average, how many people are waiting to use this ATM machine? 1.0 0.75 O 5.333 2.25
Expert Answer
Arrival rate lambda= 15 customers
Service rate mu= 3 minutes = 20 per hour
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