Final answer:
A subset of outcomes of the sample space is called an event. Event A is an arbitrary subset of the sample space, denoted by an uppercase letter. The probability of an event A is written P(A) and ranges from 0 to 1.
Step-by-step explanation:
A subset of outcomes of the sample space is called an event. Event A is an arbitrary subset of the sample space, denoted by an uppercase letter. The probability of an event A is written P(A) and ranges from 0 to 1. If P(A) = 0, it means the event A can never happen. If P(A) = 1, it means the event A always happens. For example, if the experiment is to flip three fair coins, event A might be getting at most one head.