# NCERT Solutions for Class 9 Maths Chapter 15

Class 9 Maths Chapter 15 Probability Solutions are given here with PDF and Videos. Get the NCERT Solutions for Class 9 Maths Chapter 15 Probability Exercise 15.1 in English Medium and 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 2020-21. Class 9 NCERT Textbook Solutions for 2020-21 are also available in the format of Offline and Online Apps at Play Store as well as App Store free to download.

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## NCERT Solutions for Class 9 Maths Chapter 15

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.

### 9th Maths Exercise 15.1 Solutions

### Study Material for 2020-21

#### Class 9 Maths Exercise 15.1 Solutions in Video

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

गेंदें, जिनपर चौका मारा गया = 6

इसलिए, गेंदें, जिनपर चौका नहीं मारा गया = 30 – 6 = 24

P(चौका नहीं मारा गया )

= (24)/30 = 4/5 = 0.8

अतः, चौका न मारे जाने की प्रायिकता 0.8 है।

of Probability Theory.