# Probability class 10 Notes Mathematics

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## CBSE Guide Probability class 10 Notes

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## 10 Mathematics notes Chapter 15 Probability

Download CBSE class 10th revision notes for Chapter 15 Probability in PDF format for free. Download revision notes for Probability class 10 Notes and score high in exams. These are the Probability class 10 Notes prepared by team of expert teachers. The revision notes help you revise the whole chapter in minutes. Revising notes in exam days is on of the the best tips recommended by teachers during exam days.

CBSE Class 10 Mathematics
Revision Notes
CHAPTER 15
PROBABILITY

(i) Probability
(ii) Miscellaneous Questions

1. The Theoretical probability of the occurence of an event E written as P(E) is P(E)=$\frac{{Number\;of\; outcomes \;favourable \;of\; E}} {{Number \;of \;all\; possible\; outcomes \;of \;the \;experiment}}$
2. Experiment: An activity which ends in some well defined outcomes is called an experiment.
3. Trial: Performing an experiment once is called a trial.
4. Event: The possible outcomes of a trial is called an event.
5. Sure event: An event whose occurence is certain is called a sure event.
6. The sum of the probability of all the elementary events of an experiment is 1.
7. The probability of a sure event is 1 and probability of an impossible event is 0.
8. If E is an event, in general, it is true that ${\text{P}}\left( {\text{E}} \right){\text{ }} + {\text{ P }}\left( {\overline {{\text{E }}} } \right){\text{ }} = {\text{ 1}}.$   $[ P(\overline E) = P(not E) ]$
9. From the definition of the probability, the numerator is always less than or equal to the denominator therefore $0 \le P(E) \le 1$.