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26 Oct 2021
Given information
Three professors at George Washington University did an experiment to determine if economists are more selfish
than other people. They dropped stamped, addressed envelopes with cash in different classrooms on the George
Washington campus. were returned overall. From the economics classes of the envelopes were returned. From
the business, psychology, and history classes were returned.
Let: = money returned; = economics classes; other classes.
Step-by-step explanation
Step 1.
Let be the money returned, and
be the economic classes.
the other classes.
Given that were returned overall.
Therefore, the probability for the overall percent of money returned is given as
.
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