General multiplication rule
The general multiplication rule says P(A and B) equals P(A) times the conditional probability of B given A, and it holds for any two events.
The rule is , where is the intersection symbol (A and B) and is read the probability of B given A. No independence is required, because the conditional factor already accounts for any way the first event shifts the second. Drawing two cards from a standard 52-card deck without replacement, . When the events happen to be independent, and the rule collapses to the simple product.
Where this comes up
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