1. Some Basic Definitions
(i) Trial: A single performance of a random experiment is known as a trial.
(ii) Sample space: The set consisting of all possible outcomes of a random experiment is known as sample space.
(lii) Event: A subset of the sample space of a random experiment is called an event.
2. Probability: Let n be the total number of trials and m be a favourable event. The empirical probability P(E) of an event E happening, is given by
- The probability of any certain event is 1.
- The probability of an impossible event ¡s 0.
- 0 ≤ P(E) ≤ 1.