Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 10 Counting Methods and Probability - Investigating Algebra Activity - 10.4 Find Probabilities Using Venn Diagrams - Draw Conclusions - Page 706: 1c


Use the purple area.

Work Step by Step

In order to find the probability that a student has both a sister and a brother, divide the intersection of the sets (the purple area on the Venn Diagram) by the overall number of students.
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