Question
In a class of students, the following data table summarizes how many students have a brother or a sister. What is the probability that a student chosen randomly from the class has a brother and a sister?
Has a brother Does not have a brother
Has a sister 6 7
Does not have a sister 3 5
Has a brother Does not have a brother
Has a sister 6 7
Does not have a sister 3 5
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