The Average Number of Calls Received by a Switchboard in a 30-Minute

question 146

Essay

The average number of calls received by a switchboard in a 30-minute period is 15.
a.Define the random variable in words for this experiment.
b.What is the probability that between 10:00 and 10:30 the switchboard will receive exactly 10 calls?
c.What is the probability that between 10:00 and 10:30 the switchboard will receive more than 9 calls but fewer than 15 calls?
d.What is the probability that between 10:00 and 10:30 the switchboard will receive fewer than 7 calls?

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Definitions:

Emotional Issues

Psychological challenges or concerns that affect an individual's feelings and emotional well-being.

Indirect Approach

A communication method where the main point is presented after the details or background information.

Negative News

Information or updates that are unfavorable or pessimistic, often impacting perceptions or decisions.

Audience Preview

A technique used in presentations and speeches to give the audience a brief overview of the main points to be covered.