Question: QUESTION 1 A single Automated Teller Machine (ATM) is located on the ground floor of a popular shopping mall. Service time at this machine is

QUESTION 1 A single Automated Teller Machine

QUESTION 1 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 12 customers an hour. Relevant formulas to analyze this M/M/1 model are available in your textbook. What is the probability that this machine is being used? O a. 40% O b. 80% O c. 0% O d. 60% O e. 20%

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