Summary (Grade 12 NSC Matric Mathematics): Flashcards

$P(A \text{ or } B) = P(A) + P(B) - P(A \text{ and } B)$

$P(A \text{ or } B) = P(A) + P(B)$

$P(\text{not } A) = 1 - P(A)$

$P(A \text{ and } B) = P(A) \times P(B)$

$n(A) \times n(B)$ outcomes

$n!$ (n factorial)

$n^r$

Unions, intersections, complements of events

Multiply probabilities along branches

'Or' questions; 'and' questions