**Probability class 9 ncert solutions pdf** covers the topic of Probability and **probability formulas**. To get in-depth knowledge on **probability class 9 notes** the students can refer to **probability class 9 ncert solutions pdf**** **given below**.**

**Probability**

** **Probability is the measure of the likeliness that an event will occur. Probability is quantified as a number between 0 and 1 (where 0 indicates impossibility and 1 indicates certainty)

**Benefits of Probability **

It is widely used in the study of Mathematics, Statistics, Gambling, Physical sciences, Biological sciences, Weather forecasting, Finance etc. to draw conclusions. Insurance companies use this to decide on financial policies.

**Terminology in Probabilty**

**Randomness**

** **In mathematics, When next outcome of the experiment cannot be determined then we say it is a random experiment.

**Trial**

** **A trial is an action which results in one or several outcomes, for example each toss of the coin and each throw of the die are called trials.

**Independent Trial**

** **Successive trials of some random event for example tosses of a coin, throws of a die are said to be independent if the outcome of any one trial does not impact the outcomes of any others.

**Experiment**

** **Experiment and trial is same thing as such. An experiment is a situation involving chance or probability that leads to results called outcomes. But sometimes we use experiment to refer to whole large number of trials.

**Event**

An event is a possible outcome of the Experiment. Like head coming in a toss

**Sample space**

It is a set of all possible outcomes of an experiment.

**Probability formulas**

Few of the** Probability formulas **are**:**

** ****P(A) = Number of favorable outcomes/ Total number of possible outcomes**** **

**Empirical Probability**

** **Experimental or empirical probability is an estimate that an event will happen based on how often the event occurs after performing an experiment in a large number of trials.

It is a probability of event which is calculated based on experiments

Empirical probability depends on experiment and different will get different values based on the experiment.