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Probability

Telangana Open School (TOSS) · Class 12 · Mathematics

Quick revision notes for Probability — Telangana Open School (TOSS) Class 12 Mathematics. Key concepts, formulas, and definitions for last-minute revision.

49 questions30 flashcards5 concepts

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Key Topics to Revise

1

Random Experiment and Sample Space

  • A random experiment is one that can be repeated under identical conditions, but its outcome cannot be predicted beforehand.
  • All possible outcomes of a random experiment are known in advance.
  • The set of all possible outcomes is called the sample space (S).
2

Types of Events

  • An event is a subset of the sample space.
  • Equally likely events have the same chance of occurring.
  • Mutually exclusive events cannot happen at the same time.
3

Classical Definition of Probability

  • Probability of an event = Number of favorable outcomes / Total number of possible outcomes.
  • This applies only when all outcomes are equally likely.
  • Probability values range from 0 (impossible) to 1 (certain).
4

Addition and Multiplication Rules

  • Addition Rule: P(A ∪ B) = P(A) + P(B) - P(A ∩ B)
  • If A and B are mutually exclusive, P(A ∩ B) = 0, so P(A ∪ B) = P(A) + P(B)
  • Multiplication Rule: P(A ∩ B) = P(A) × P(B|A)

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Full Notes

Key Concepts

An experiment that can be repeatedThe set of all possible outcomesA subset of the sample spaceEqually likely events have the sameIf a random experiment has 'n'

Frequently Asked Questions

What are the important topics in Probability for Telangana Open School (TOSS) Class 12 Mathematics?
Probability covers several key topics that are frequently asked in Telangana Open School (TOSS) Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Probability — Telangana Open School (TOSS) Class 12 Mathematics?
Understand the core concepts first, then work through the 49 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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