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What Is the Expected Number of Phone Calls Per Hour

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What is the expected number of phone calls per hour based on the following distribution on the number of phone calls per hour?
What is the expected number of phone calls per hour based on the following distribution on the number of phone calls per hour?


Definitions:

Malaria

Disease caused by the protozoan Plasmodium vivax; transmitted by the Anopheles mosquito.

Fungi

A kingdom of organisms that includes molds, yeasts, and mushrooms, which live by decomposing and absorbing the organic material in which they grow.

Lichens

Symbiotic associations between a fungus and a photosynthetic partner (usually an algae or cyanobacteria), living together on surfaces like rocks or trees.

Algae

A diverse group of photosynthetic organisms that are not necessarily closely related, ranging from unicellular microalgae to large multicellular forms, inhabiting both freshwater and marine environments.

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