Probability

Any subset E of a sample

Any subset E of a sample space S is called an event. An event has occurred if the outcome ω of the experiment satisfies ω ∈ E.

The empty set φ is

The empty set φ is an impossible event because no outcome of the sample space can make it occur.

The whole sample space S

The whole sample space S is called the sure event because it always occurs when the experiment is performed.

If an event has exactly one

If an event has exactly one sample point, it is a simple or elementary event. In a sample space with n distinct elements, there are exactly n simple e

If an event has more than

If an event has more than one sample point, it is a compound event.