RD Sharma Solutions Class 9 Probability

RD Sharma Solutions Class 9 Chapter 25

RD Sharma solutions Class 9 Chapter 25 is given here which consists of questions and answers related to probability.

“Probability is the measure of the possibility that an event will occur”.  It is qualified as a number between zero and one. A simple example of probability is tossing of the coin. A coin consists of two sides, head and a tail, which means there are only two outcomes. The probability of tails equals the probability of heads. The probability of tails or heads is 1/2 since there are no other outcomes.

What is Probability?

Probability is the measure of the likelihood of an event to occur. Many events cannot be predicted with total certainty. We can predict only the chance of event to occur, how likely they are to happen, using probability.

Probability can range in between 0 to 1, where 0 probability means the event to be an impossible one and probability 1 indicates the certain event.

Sample Space- The set of all the possible outcomes to occur in any trial is known as sample space.


Tossing a coin, Sample Space (S) = {H,T}{H,T}

Rolling a die, Sample Space (S) = {1,2,3,4,5,6}{1,2,3,4,5,6}

Sample Space is made up of Sample Points:

Sample Point- It is one of the possible results

Examples- Deck of Cards

  • 4 of hearts is a sample point
  • the queen of Clubs is a sample point

“Queen” is not a sample point. As there are four Queens i.e. four different sample points.

Experiment or Trial- It is a series of action where the outcomes are always uncertain.

Examples- Tossing of a coin, Selecting a card from deck of cards, throwing a dice.

Event- It is a single outcome of an experiment.

Examples Events-

  • Rolling a “1” is an event
  • Getting a Heads while tossing a coin is an event.

An event can have one or more than one possible outcomes:

  • An event can be Getting a “Jack” from a deck of cards (out of 52 cards, any of the 4 Jack)
  • Rolling an “odd number” (1, 3 or 5) is also an event.

Learn about the concept in depth and to how to solve problems through RD Sharma solutions that are provided in the below section. It acts as perfect self-help guidance for students without any doubt.


Class 9


Chapter 25





RD Sharma Class 9 Maths Solutions – Chapter 25

Here you will find several exercises of class 9 maths chapter 25 -Probability. Click on the links to access the maths exercises from the table

Practise This Question

In the given figure, D is the mid-point of ABand PC=12AP=3 cm. If AD=DB=4 cm and DE||BP , then AE is