There are two batteries in a UPS connected in series both must be working for the UPS to be able to function. Probability that a battery will fail on a given day is 0.1 and battery failures are independent events. Probability that UPS functions without failure on a given day is:
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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 2015 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.