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Formula Sheet

Probability

ICSE · Class 11 · Mathematics

All formulas from Probability in ICSE Class 11 Mathematics. Key equations, constants, and identities for board exam preparation.

64 questions36 flashcards5 concepts

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A series of small Venn diagrams or a single composite diagram illustrating impossible, sure, simple, and compound events within a sample space.
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10 Formulas · 3 Sections

Formulas

1. Core Ideas

Probability of an event = (Number of outcomes favourable to the event) / (Total number of outcomes)

P(Ē) = 1 − P(E)

3. Types of Events and Set Relations

Number of events from sample space = 2^n

E ∩ F = φ

E ∪ F = S

4. Probability Rules

P(E∪F) = P(E) + P(F) − P(E∩F)

P(E∪F) = P(E) + P(F)

P(E∪F∪G) = P(E) + P(F) + P(G) − P(E∩F) − P(F∩G) − P(E∩G) + P(E∩F∩G)

P(E∪F∪G) = P(E) + P(F) + P(G)

P(E∩F̄) = P(E) − P(E∩F)

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Frequently Asked Questions

What are the important topics in Probability for ICSE Class 11 Mathematics?
Key topics in Probability include Probability Concepts Overview, Probability Concepts Overview, Probability Concepts Overview. These are the concepts ICSE Class 11 examiners draw on most — study them first, then practise related questions.
How to score full marks in Probability — ICSE Class 11 Mathematics?
Understand the core concepts first, then work through the 64 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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All 18 chapters — ICSE Class 11 Mathematics Formula Sheet

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