Customers Arrive at a Video Rental Desk at the Rate

question 71

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) .
-If there are 4 servers,what is the probability of three or fewer customers in the system?

• A)0 19
• B)0 23
• C)0 63
• D)0 68
• E)0 79

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Definitions:

Decompression Melting

The melting of rock due to a decrease in pressure as it rises towards the Earth's surface, a common mechanism at mid-ocean ridges and mantle plumes.

Mantle-Derived Magmas

Magmas that originate from the partial melting of the Earth's mantle, often rich in magnesium and iron.

Continental Crust

The layer of igneous, sedimentary, and metamorphic rocks which form the continents and the shallow seas close to them, distinguished by its lower density compared to oceanic crust.

Decompression Melting

The process by which melt is generated within the Earth when a body of rock is held at approximately the same temperature but the pressure is reduced.