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10 cards from this deck
Between 0 and 1
SSS
P(E)=n(E)n(S)P(E) = \frac{n(E)}{n(S)}P(E)=n(S)n(E)
f=pnf = \frac{p}{n}f=np (ppp = positive trials, nnn = total trials)
Elements in at least one of the two sets (union)
Elements in both sets simultaneously (intersection)
All elements not in set AAA (complement)
Events that cannot occur at the same time
P(A)+P(A′)=1P(A) + P(A') = 1P(A)+P(A′)=1
P(A∪B)=P(A)+P(B)−P(A∩B)P(A \cup B) = P(A) + P(B) - P(A \cap B)P(A∪B)=P(A)+P(B)−P(A∩B)
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