A family has two children and it is known that at least one is a girl. What is the probability that both are girls given that at least one is a girl?
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DSE 2019 Question 13: Probability and Bayes' theorem
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A family has two children and it is known that at least one is a girl. What is the probability that both are girls given that at least one is a girl? (A) 1/2 (B) 2/3 (C) 1/3 (D) 3/4
Probability and Bayes' theorem has come up 190 times in 7 exams since 2004.
What this question tests
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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