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## CBSE Class 9 Maths Notes Chapter 15 Probability

**Probability Class 9 Notes Chapter 15**

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

Note:

- The probability of any certain event is 1.
- The probability of an impossible event Â¡s 0.
- 0 â‰¤ P(E) â‰¤ 1.

**Probability Class 9 Notes Pdf Chapter 15**

### NCERT Notes for Class 9 Maths

- Chapter 1 Number Systems Class 9 Notes
- Chapter 2 Polynomials Class 9 Notes
- Chapter 3 Introduction to Euclid’s Geometry Class 9 Notes
- Chapter 4 Lines and Angles Class 9 Notes
- Chapter 5 Triangles Class 9 Notes
- Chapter 6Â Coordinate Geometry Class 9 Notes
- Chapter 7 Heron’s Formula Class 9 Notes
- Chapter 8Â Linear Equations in Two Variables Class 9 Notes
- Chapter 9 Quadrilaterals Class 9 Notes
- Chapter 10 Areas of Parallelograms and Triangles Class 9 Notes
- Chapter 11 Circles Class 9 Notes
- Chapter 12 Constructions Class 9 Notes
- Chapter 13 Surface Areas and Volumes Class 9 Notes
- Chapter 14 Statistics Class 9 Notes
- Chapter 15 Probability Class 9 Notes

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