Conditional Probability Formulae (HSC SSCE Mathematics Advanced): Flashcards

Likelihood of A given B has already occurred

Probability of event A given event B

$P(A|B) = \frac{|A \cap B|}{|B|}$

Number of outcomes in both A and B

$P(A|B) = \frac{P(A \cap B)}{P(B)}$

Probability of both A and B occurring

Survey data or overlapping groups

Sequential events or joint probabilities

$P(B) \neq 0$

Between 0 and 1