There are red and black balls in an urn. You draw two balls in succession without replacing the first ball. What is the probability that the second ball you draw is red?
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2 marksStatisticsProbability and Bayes' theoremSampling with and without replacementModerateabout 2 min
DSE 2006 Question 59: Probability and Bayes' theorem
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There are 3 red and 5 black balls in an urn. You draw two balls in succession without replacing the first ball. What is the probability that the second ball you draw is red? (A) 2/7 (B) 3/8 (C) 5/7 (D) 1/4
Probability and Bayes' theorem has come up 190 times in 7 exams since 2004.
What this question tests
This question is on Sampling with and without replacement, part of Probability and Bayes' theorem in Statistics.
Drawing from a finite population and the hypergeometric probabilities that result.
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Question from the DSE 2006 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.