Consider an Espresso Stand with a Single Barista

question 66

Multiple Choice

Consider an espresso stand with a single barista. Customers arrive to the stand at the rate of 28 per hour according to a Poisson distribution. Service times are exponentially distributed with a service rate of 35 customers per hour. The probability that the server is idle and a customer may be served is

• A) 0.20.
• B) 0.60.
• C) 0.80.
• D) 1.00.

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Definitions:

Mating Structures

Physical or behavioral adaptations that facilitate reproduction, which may include specific body parts or complex courtship behaviors.

Sexual Isolation

A form of reproductive isolation where differences in mating rituals, timings, or preferences prevent members of different species or populations from interbreeding.

Behavioral Isolation

A form of reproductive isolation where two populations do not mate because of differences in courtship rituals or other behaviors.

Gametic Isolation

A type of prezygotic barrier where the gametes (egg and sperm) of two different species are unable to fuse or recognize each other, preventing fertilization.