There are two batteries in a UPS and both must be working for the battery to function. Probability that a battery will fail on a given day is 0.1 and the battery failures are independent events. What is the probability that the UPS will work without failure on a given day?
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Probability and Bayes' theorem has come up 190 times in 7 exams since 2004.
This question is on Independence, part of Probability and Bayes' theorem in Statistics.
When one event tells you nothing about another, and how it differs from being mutually exclusive.
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Question from the UoH 2013 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.