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Formula Sheet

Probability — Formula Sheet

ICSE · Class 11 · Mathematics

9 formulas from Probability (ICSE Class 11 Mathematics) on one page, grouped by topic. Part of the ICSE Class 11 Mathematics syllabus.

64 questions36 flashcards9 formulas & key relations5 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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9 Entries · 4 Sections

Formulas and Key Relations

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

P(E∩F̄) = P(E) − P(E∩F)

Classical and Axiomatic Approaches to Probability

In the axiomatic approach, P(E) is always non-negative and P(S) = 1.

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Frequently Asked Questions

What are the important topics in Probability for ICSE Class 11 Mathematics?
Key topics in Probability include Basic Ideas: Experiment, Random Experiment, Sample Space, and Event, Types of Events, Classical and Axiomatic Approaches to Probability, Card Facts and Standard Deck Information. Study these first, then practise questions on each for Class 11 exams.
How many formulas are in Probability?
This sheet lists 9 formulas from Probability, grouped by topic. Learn what each symbol stands for so you can apply the formula, not just recall it.
How should I revise Probability for Class 11 exams?
Learn the core ideas first, then work through the 64 practice questions on Probability. Revise 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.

More resources for Probability

All ICSE Class 11 Mathematics Formula Sheet

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