NCERT Solutions for Class 9 Maths Chapter 15 Probability

NCERT Solutions for Class 9 Maths Chapter 15 Probability Exercise 15.1 in English Medium and Hindi Medium to download in PDF or study online. Students can get NCERT Books, CBSE Sample Papers, NCERT Exemplar  Problems solutions and CBSE Notes for important subjects.

NCERT Solutions for Class 9 Maths Chapter 15 Probability

All solutions are revised as per Latest CBSE Curriculum 2019-20 and updated, removing errors and simplifying according to suggestions received by the students. NCERT Solutions for Class 9 Maths Chapter 15 is given below.


Class 9 Maths Chapter 15 Exercise 15.1 Solutions
Exercise 14.1 Solutions Online
प्रश्नावली 14.1 हल in Hindi
Download Exercise 14.1 in PDF

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The words ‘probably’, ‘doubt’, ‘most probably’, ‘chances’, etc., used in the statements above involve an element of uncertainty. For example, in (1), ‘probably rain’ will mean it may rain or may not rain today. We are predicting rain today based on our past experience when it rained under similar conditions. Similar predictions are also made in other cases listed in (2) to (5). The uncertainty of ‘probably’ etc can be measured numerically by means of ‘probability’ in many cases.Though probability started with gambling, it has been used extensively in the fields of Physical Sciences, Commerce, Biological Sciences, Medical Sciences, Weather Forecasting, etc. NCERT Solutions for class 9 is very useful.

Probability – an Experimental Approach

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.

The first book on the subject was written by the Italian mathematician, J.Cardan (1501–1576). The title of the book was ‘Book on Games of Chance’ (Liber de Ludo Aleae), published in 1663. Notable contributions were also made by mathematicians J. Bernoulli (1654–1705), P. Laplace (1749–1827), A.A. Markov (1856–1922) and A.N. Kolmogorov (born 1903).

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