Key Takeaways
Lesson Description
Key Takeaways
• Probability quantifies uncertainty.
• Independent events multiply probabilities.
• Mutually exclusive events add probabilities.
• Random variables assign numerical values to outcomes.
• Expected value represents the long-run average outcome.
Must Know Equations
Addition Rule:
P(A∪B)=P(A)+P(B)−P(A∩B)
Multiplication Rule:
P(A∩B)=P(A)P(B)
(Independent Events)
Expected Value:
μ = Σxp(x)
Must Know Vocabulary
Probability
Independent Events
Mutually Exclusive Events
Random Variable
Expected Value
Probability Distribution
AP Exam Focus
• Apply probability rules.
• Interpret expected value.
• Calculate probabilities from distributions.