User:Saul/probability

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Revision as of 22:51, 6 March 2020 by Saul (talk | contribs) (Notations)

Notations

Ω - The outcome space.
ω - An outcome.
- A non event.
- Union.
- Intersection.
- Is in.
- Is not in.
- Subset of.
- Subset or equal to.

Note: there is a small difference between & but sometimes they get used interchangeably.

- Is not a subset of.
- Superset of.
- Is not a superset of.
ℙ(A) - Probability of A.
Ac - A compliment - The event A does not occur.
ω∈A - The outcome ω is in the event A
A∪B - The union of A and B - The set containing all the elements from A and B without duplicates.
A∩B - The intersection of A and B - The set containing all the common elements from A and B.
A∩B = ∅ - The sets A and B are disjoint.
ℙ(A∪B) = ℙ(A) + ℙ(B) - The sets A and B are disjoint.
#A - The number of elements A contains if A is finite.