4.3 Addition Rule & Conditional Probability
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8 Terms
∪
a mathematical symbol that represents the union of sets; it also represents “or”
conditional probability
a probability that takes into account a given condition
P(B|A) = (P(A∩B)) / (P(A))
the formula for conditional probability
general addition rule
a rule for finding the probability of event A or event B when the events are not mutually exclusive
(A∪B)= P(A)+P(B)−P(A∩B)
the formula for the general addition rule
∩
a mathematical symbol that represents the intersection of sets; it also represents “and”
venn diagram
a figure with one or more circles inside a rectangle - the rectangle represents the sample space of an experiment, and the circles represent events
A^C
the notation for the complement of event A
Note 
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