There is a class of 20 students, S1, S2, S3, . . . , S20. We need to form a study group of at least 2 students. The study group must include at least one of S1, S2 or S3. How many ways do we have forming the study group?
There is a class of 20 students, S1, S2, S3, . . . , S20. We need to form a study group of at least 2 students. The study group must include at least one of S1, S2 or S3. How many ways do we have forming the study group?
Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
1st Edition
ISBN:9781680331141
Author:HOUGHTON MIFFLIN HARCOURT
Publisher:HOUGHTON MIFFLIN HARCOURT
Chapter11: Data Analysis And Displays
Section: Chapter Questions
Problem 1CA
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There is a class of 20 students, S1, S2, S3, . . . , S20. We need to form a study group of at
least 2 students. The study group must include at least one of S1, S2 or S3. How many
ways do we have forming the study group?
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