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A class with n kids lines up for recess. The order in which the kids line...

A class with n kids lines up for recess. The order in which the kids line up is random with eachordering being equally likely. There are two kids in the class named Betty and Mary. The use of theword “or” in the description of the events, should be interpreted as the inclusive or. That is “A or B”means thatAis true,Bis true, or bothAandBare true.What is the probability that Betty is first in line or Mary is last in line as a function ofn? Sim-plify your final expression as much as possible and include an explanation of how you calculated thisprobability.

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