Your teacher knows jokes and in each class tells jokes; each joke has an equal chance of being selected. What is the probability that, in a given lecture, at least joke is told that was not told in the previous class?
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Your teacher knows 6 jokes and in each class tells 2 jokes; each joke has an equal chance of being selected. What is the probability that, in a given lecture, at least 1 joke is told that was not told in the previous class? (A) 28/30 (B) 14/30 (C) 16/30 (D) 12/30
Probability and Bayes' theorem has come up 190 times in 7 exams since 2004.
This question is on Addition rule, complements and inclusion-exclusion, part of Probability and Bayes' theorem in Statistics.
The probability of at least one of several events, and of none.
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Question from the DSE 2006 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.