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Formula Sheet

Probability — Formula Sheet

AP EAPCET · Mathematics

Free Probability formula sheet for AP EAPCET Mathematics 2026 — all important formulas, equations, and constants for quick reference.

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A diagram illustrating a random experiment (e.g., rolling a fair six-sided die) showing all possible outcomes and how they form the sample space. Each outcome is distinct.
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Formula Sheet — Probability

Important formulas and equations from Probability for AP EAPCET Mathematics.

Formulas — Probability

Basic Concepts and Sample Space

P(E) = Number of favorable outcomes / Total number of outcomes
P(E) = n(E) / n(S)

Types of Events

Algebra of Events

P(A') = 1 - P(A)
P(A ∪ B) = P(A) + P(B) - P(A ∩ B)
P(A ∪ B) = P(A) + P(B)
P(A - B) = P(A ∩ B') = P(A) - P(A ∩ B)

Addition Theorems

P(A ∪ B ∪ C) = P(A) + P(B) + P(C) - P(A ∩ B) - P(B ∩ C) - P(A ∩ C) + P(A ∩ B ∩ C)
P(A ∪ B ∪ C) = P(A) + P(B) + P(C)
P(exactly one of A,B,C) = P(A) + P(B) + P(C) - 2P(A∩B) - 2P(B∩C) - 2P(A∩C) + 3P(A∩B∩C)
P(exactly two of A,B,C) = P(A∩B) + P(B∩C) + P(A∩C) - 3P(A∩B∩C)
P(at least two of A,B,C) = P(A∩B) + P(B∩C) + P(A∩C) - 2P(A∩B∩C)

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Frequently Asked Questions

What topics are covered in Probability for AP EAPCET?
Probability is an important chapter in AP EAPCET Mathematics. It covers key concepts and formulas that are frequently tested in the exam. Key topics include: Random Experiments and Sample Space, Types of Events, Axiomatic Definition of Probability, Addition Theorem and Union of Events.
How important is Probability for AP EAPCET?
Probability is a frequently tested chapter in AP EAPCET Mathematics. Questions from this chapter appear regularly in previous year papers. There are 233 practice questions available for this chapter.
How to prepare Probability for AP EAPCET?
Start by understanding the core concepts, then solve practice questions. Focus on formulas and their applications. Use revision notes for quick review before the exam.

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