Probability of Events in an Experiment

The chance or likelihood of something happening is called its probability

We can describe probability using the words - likely, equally likely, certain, unlikely, or impossible

When there is a very small chance that an event happens, the event is said to be unlikely. When there is quite a good chance that an event happens, that event is said to be likely

When there is an equal chance that an event happens or it does not, the event is said to be as likely as not

When there is no chance that an event happens, the event is said to be impossible. When there is a definite chance that an event happens, the event is said to be certain

Probability is a number that defines the chance or likelihood an event has to occur

It is a number from 0 to 1. A probability of 0 means the event is impossible. For example, the probability that you will live to the age of 200 is 0

A probability of 1 means the event is certain. For example, the probability that the sun will rise tomorrow is 1

Probability of an event = Number of favorable outcomes/Number of possible outcomes