The document Facts that Matter- Probability Class 9 Notes | EduRev is a part of the Class 9 Course Mathematics (Maths) Class 9.

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**Facts that Matter**

- An operation which can produce some well-defined outcomes is called an experiment.
- An experiment in which all possible outcomes are known and the exact outcome cannot be predicted in advance, is called a random experiment.
- Performing a random experiment is called trial.
- The empirical (or experimental) probability P(E) of an event E is given by

- The probability of an event lies between 0 and 1.

**UNCERTAINTY**

A doubtful situation of an action or activity that may or may not take place, is called ‘uncertainty’.

**PROBABILITY**

The numerical measure of uncertainty of an action (or activity) is called probability.

Note:The words ‘doubt’, ‘chances’, ‘most probably’ etc., show uncertainty or probability of happening of an action or activity.

192 videos|230 docs|82 tests

### NCERT Textbook- Probability

- Doc | 15 pages
### Value Based Questions- Probability

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### Test: Probability Experimental Approach

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### Ex 15.1 NCERT Solutions- Probability

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### Test: Probability- 1

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### What is Probability?

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