Class 9 Maths - ODISHA
Probability
The chapter 'Probability' in Class 9 Mathematics under the Odisha BSE board introduces students to the mathematical study of uncertainty and chance. You will learn how to measure the likelihood of an event occurring based on observations and experiments. The curriculum covers empirical or experimental probability, where outcomes are determined by actually performing or recording trials. This chapter is vital for the BSE Odisha board exams as it tests both conceptual understanding and basic arithmetic calculation. Mastering this topic not only helps you score high marks in school assessments but also builds a strong foundation for advanced statistics in higher classes.
Start Learning FreeKey Concepts
Random Experiment
An experiment whose outcome cannot be predicted with certainty in advance, even though all possible outcomes are known.
Sample Space
The complete set of all possible outcomes of a random experiment.
Event
A collection of one or more outcomes of an experiment, representing a specific subset of the sample space.
Empirical Probability
The probability of an event calculated on the basis of the results of an actual experiment or historical data.
Range of Probability
The probability of any event always lies between 0 and 1, inclusive, where 0 represents an impossible event and 1 represents a sure event.
Important Formulas
Board Exam Info
In the Odisha BSE Class 9 examination, Probability typically carries around 4 to 6 marks. Questions usually include 1-mark objective multiple-choice questions (MCQs), short-answer fill-in-the-blanks, and 2 to 3-mark word problems based on coin tosses, rolling dice, drawing cards, or survey data.
Frequently Asked Questions
Can the probability of an event ever be negative or greater than 1?
No, probability can never be less than 0 or greater than 1. It is always expressed as a fraction, decimal, or percentage between 0% and 100%.
What is the difference between theoretical and empirical probability in Class 9?
In Class 9 BSE syllabus, you primarily study empirical (experimental) probability, which depends on actual trial results. Theoretical probability is based on logical reasoning without conducting experiments, which you will study in later classes.
How should I write the final answer for probability word problems in the board exam?
Always write the formula first, state the total number of possible outcomes and favorable outcomes clearly, substitute the values, and reduce the final fraction to its simplest form.
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