Apply the Addition Rule
Start lessonBegins with Double counting and the rule · Slides
Teacher tools for this standard
Lesson Plan · Guided Notes · Exit Ticket · Re-teach · Homework
Teacher tools for this standard
Lesson Plan · Guided Notes · Exit Ticket · Re-teach · Homework
- Lesson Plan →Objectives, pacing and practice, built from this lesson's brief.
- Guided Notes →One page your students fill in and keep.
- Exit Ticket →Three items at the end of class. No student accounts.
- Re-teach →After an exit ticket: who missed what, and what to do tomorrow.
- Homework →Assign practice; it grades itself.
HSS.CP.B.7
**HSS.CP.B.7**: Apply the Addition Rule, P(A or B) = P(A) + P(B) - P(A and B), and interpret the answer in terms of the model.
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HSS.CP.B.7: Apply the Addition Rule, P(A or B) = P(A) + P(B) - P(A and B), and interpret the answer in terms of the model.
What you'll learn
- State and apply the Addition Rule, P(A or B) = P(A) + P(B) - P(A and B)
- Explain why P(A and B) is subtracted - the overlap is double-counted when P(A) and P(B) are added - using a Venn diagram
- Apply the special case for mutually exclusive events, P(A or B) = P(A) + P(B), and recognize when it applies
- Compute P(A or B) from sample-space counts, two-way tables, and given probabilities
- Interpret the resulting probability in terms of the model and its context
Review first:
Slides
Step through the lesson, or watch it as a narrated video • 2 slide decks
1
Double counting and the rule
✓ Start here2
Mutually exclusive and tables
Practice
Try it on your own
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