Class 9 Maths Chapter 15 Probability Solutions are given here with PDF and Videos for CBSE Second term Exams. Get the NCERT Solutions for Class 9 Maths Chapter 15 Probability Exercise 15.1 in English and Hindi Medium.

## Class 9 Maths Chapter 15 All Exercises Solutions

### NCERT Solutions for Class 9 Maths Chapter 15

Get Prashnavali 15.1 in Hindi Medium to study online or download in PDF format. UP Board High School Students are now using NCERT Textbook for their study. So, they can also download UP Board Solutions for Class 9 Maths Chapter 15 Probability (Prayikta) which is updated for new academic session 2022-23. Class 9 NCERT Textbook Solutions for 2022-23 are also available in the format of Offline and Online Apps at Play Store as well as App Store free to download. All the questions are described well in easy language, so that students of CBSE Board, MP Board, Gujrat Board and UP Board can understand easily in the new academic session 2022-23. For any help, students can call us for support. We are here to help you without any charge.

• ### Class 9 Maths Study Material for 2022-23

 Class: 9 Maths (English and Hindi Medium) Chapter 15: Probability

## 9th Maths Chapter 15 Solutions in English & Hindi Medium

NCERT Solutions for Class 9 Maths Chapter 15 Probability Exercise 15.1 in English Medium and Hindi Medium is given below. These Solutions are applicable for UP Board Class 9 Students also. So, get here Class 9 Maths up board solutions also. Visit to Discussion Forum to ask your doubts and share your knowledge with the others.

### What is meant by an Experiment in probability?

Experiment: An operation which can produce some well-defined outcomes, is called an experiment.

### What is meant by Random Experiment?

Random Experiment: An experiment which, when repeated under identical conditions, do not produce the same outcomes every time, but if the outcomes produced is one out of the several possibilities, is known as a random experiment.

### What is considered as an Event?

Event: A possible outcome or combination of outcomes is called an event.

### Differentiate between Sure Event and Impossible Event.

Sure Event: If probability of an event is 1, then the event is called certain event or sure event.
Impossible Event: If probability of an event is 0, then event is called an impossible event.

#### Important Notes on 9th Maths Chapter 15

Basic Terms
1. The probability of an event is given by
P(E) = [Number of trials in which E has happened]/[Total number of trials].
2. The probability of happening of an event always lies from 0 to 1.
3. The sum of all the possibilities of all possible outcomes of an experiment is 1.
4. Experimental probability of an event can never be negative.

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### How did the concept of probability develop?

The concept of probability developed in a very strange manner. In 1654, a gambler Chevalier de Mere, approached the well-known 17th century French philosopher and mathematician Blaise Pascal regarding certain dice problems. Pascal became interested in these problems, studied them and discussed them with another French mathematician, Pierre de Fermat. Both Pascal and Fermat solved the problems independently. This work was the beginning of Probability Theory.

### What is trial in probability?

A trial is an action which results in one or several outcomes.

### What is an event in probability?

An event for an experiment is the collection of some outcomes of the experiment.

### What is the quantitative range of probability?

The Probability of an event lies between 0 and 1 (0 and 1 inclusive).