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The cap symbol is used in math to represent the set intersection operator. Typically, it is used in an expression like this:
In plain language, this expression means the intersection of the sets and . The cap symbol is also in probability to represent the occurence of two events.
In plain language, this expression means the probability of the event and the event occuring.
The set union symbol, also called the cup symbol, represents the union operator in set theory.
The set intersection operator returns the shared elements between two sets. The operator is denoted using the cap symbol.
The conditional probility formula shows how to calculate the probability of a event B, given that another event A has already occured.