The set of all the possible experiments is called the sample space.

The greater the probability, the less likely the event is to occur.

Probability can be negative or positive and always range between 0 and 1.

Probability is the numerical assessment of likelihood on a scale from 0 (impossibility) to 1 (absolute certainty).

An event is any fact, which may occur as a result of an experiment with random outcome or may not.

Probability aids in determining the effectiveness of treatments and understanding the risks of diseases.

The two events “it rained on Monday” and “it did not rain on Monday” are independent events.

The probability of an event is defined to be the ratio of the number of cases favourable to the event - i.e. the number of outcomes in the subset of the sample space defining the event - to the total number of cases.

Probability theory is the branch of mathematics that deals with probability.

An event that has produced the desired result or unexpected event is called a favourable outcome.