5 men and 5 women are seated randomly in a single circle of chairs. The expected number of women sitting next to at least 1 man equals
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2 marks, −0.666666666666667StatisticsProbability and Bayes' theoremExpectation by indicator variablesHardabout 3 min
DSE 2014 Question 41: Probability and Bayes' theorem
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5 men and 5 women are seated randomly in a single circle of chairs. The expected number of women sitting next to at least 1 man equals (A) 23/6 (B) 25/6 (C) 4 (D) 17/4
Probability and Bayes' theorem has come up 190 times in 7 exams since 2004.
What this question tests
This question is on Expectation by indicator variables, part of Probability and Bayes' theorem in Statistics.
Finding expected counts by adding up simple 0-1 variables.
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