An urn has red and black balls. Two balls are drawn in succession without replacing the first. The probability that the second ball is red equals
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2 marks, −0.666666666666667StatisticsProbability and Bayes' theoremSampling with and without replacementModerateabout 3 min
DSE 2017 Question 38: Probability and Bayes' theorem
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An urn has 3 red and 5 black balls. Two balls are drawn in succession without replacing the first. The probability that the second ball is red equals (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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