CBSE Class 10 Maths Revision Notes Chapter 15 Probability
(ii) Miscellaneous Questions
- The Theoretical probability of the occurence of an event E written as P(E) is P(E)=
- Experiment: An activity which ends in some well defined outcomes is called an experiment.
- Trial: Performing an experiment once is called a trial.
- Event: The possible outcomes of a trial is called an event.
- Sure event: An event whose occurence is certain is called a sure event.
- The sum of the probability of all the elementary events of an experiment is 1.
- The probability of a sure event is 1 and probability of an impossible event is 0.
- If E is an event, in general, it is true that
- From the definition of the probability, the numerator is always less than or equal to the denominator therefore .