Essay
A statistics student plans to use a TI-84 Plus calculator on her final exam. From past experience, she estimates there is a 0.92 probability that the calculator will work on any
given day. Because the final exam is so important, she plans to bring in two calculators in
case one loses power. Does she gain much by bringing in the backup calculator? Use the
probability that she will be able to complete her exam with a working calculator.
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