GRADE 11 MATH · CHAPTER 2
Data, statistics & probability
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AN EXAMPLE FROM THIS CHAPTER
A group of 2 people is chosen from 5 people. Order does not matter. How many different groups are possible?
Show answer & explanation
10
Use combinations: 5! / (2! × 3!) = 10. Each unordered group is counted once.
Curriculum & source notes
These are original Little Play study books organized around U.S. school topics. The official curriculum references below guide topic scope and progression. Coverage is selected, not a complete curriculum or a verified match to every state standard. They are not copies of a publisher’s textbook. Check your school’s syllabus and book edition.
High-school courses can be taken in different years. Choose the topic that matches the student’s current course.
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