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: 3


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Work Step by Step

You would add the number of people with a sister to the number of people with a brother. You would then subtract the number of people with both a sister and a brother (so that they are not counted twice). Finally, divide this value by the overall number of students.
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