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Learning Goal
Part of: Use the rules of probability to compute probabilities of compound events in a uniform probability model — 2 of 4 cluster items
Apply the Addition Rule
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
Prerequisites
Slides
Interactive presentations perfect for visual learners • 2 slide decks
Slide Video
Watch narrated slides play like a video lesson • Narrated slide playback