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Venn Diagrams Learning Pages

Page: How Do I Interpret and Draw Venn Diagrams?

RAPID TEST
36 students in a class were asked about their siblings.
17 students had at least one brother.
15 students had at least one sister.
7 students had at least one brother and at least one sister.

State the numbers that would complete the Venn diagram above for this scenario, where B and S represent students that had at least one brother and students that had at least one sister, respectively.
w = π + − ÷ × < > ≤ ≥ π , x = π + − ÷ × < > ≤ ≥ π , y = π + − ÷ × < > ≤ ≥ π , z = π + − ÷ × < > ≤ ≥ π
Work out the probability that a student in the class has a brother, given that they have a sister. Give your answer as a decimal to 3 significant figures. π + − ÷ × < > ≤ ≥ π

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