The probability that A or B occurs, or both occur, is denoted by P(A or B).
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Summary The probability of both A and B occurring is the joint probability of A and B, denoted P(AB).
P(A | B) = P(AB)/P(B), P(B) ≠ 0.
The multiplication rule for probabilities is P(AB) = P(A | B)P(B).
<span>The probability that A or B occurs, or both occur, is denoted by P(A or B).
The addition rule for probabilities is P(A or B) = P(A) + P(B) − P(AB).
When events are independent, the occurrence of one event does not affect the prob
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