Customers Arrive at a Video Rental Desk at the Rate

question 34

Multiple Choice

Customers arrive at a video rental desk at the rate of one per minute (exponential interarrival times) . Each server can handle 0.4 customers per minute (exponential service times) .
What is the minimum number of servers needed to achieve an average time in the system of less than three minutes?

• A) 2
• B) 3
• C) 4
• D) 5
• E) 6

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Definitions:

Phrenic Nerve

A nerve that originates in the neck and passes down between the lung and heart to reach the diaphragm, playing a crucial role in breathing by stimulating the diaphragm to contract and relax.

Cervical Plexus

A network of nerves in the neck that provides sensory and motor function to parts of the head, neck, and shoulders.

Cervical Nerves

The nerves that emerge from the cervical vertebrae in the neck and are involved in motor and sensory functions of the neck, shoulders, arms, and hands.

Sciatic Nerve

The largest and longest nerve in the human body, running from the lower back through the buttocks and down each leg.