In a college, of the students failed in Economics, of the students failed in English and of the students failed in both Economics and English. A student is selected at random. If he failed in English, what is the probability that he failed in Economics?
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In a college, 25% of the students failed in Economics, 15% of the students failed in English and 10% of the students failed in both Economics and English. A student is selected at random. If he failed in English, what is the probability that he failed in Economics? (A) 2/5 (B) 2/3 (C) 3/10 (D) 2/10
Probability and Bayes' theorem has come up 190 times in 7 exams since 2004.
This question is on Conditional probability and the multiplication rule, part of Probability and Bayes' theorem in Statistics.
Probabilities that change when you know something has happened.
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Question from the UoH 2021 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.