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OpenStudy (anonymous):
Approximately 15% of Americans have a blood type of B. The local blood bank has 80 donors stop by on a given day (which can be considered a random sample from the population). What is the probability that between 15% and 20% of the donors on a given day have a blood type of B? Be sure to state and justify your assumptions.
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OpenStudy (anonymous):
http://openstudy.com/study#/updates/51240a43e4b086b98ebd8181
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