Learning objective

Recognize and apply probability symbols. The probability of event A is denoted as P(A), the probability of not A as P(A′), the probability of both A and B occurring as P(A ∩ B), and the probability of either A or B occurring as P(A ∪ B).

Read the explanation, check the common trap, then practise with flashcards and questions.

Exam focus

Cambridge IGCSE StatisticsProbability

Study support

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Quick explanation

This point belongs to Probability, especially Probability outcomes.
You need to be able to recognize and apply probability symbols. The probability of event A is denoted as P(A), the probability of not A as P(A′), the probability of both A and B occurring as P(A ∩ B), and the probability of either A or B occurring as P(A ∪ B).
The key ideas to know are Define and State.
Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

DefineState

Why it matters

This objective helps connect Probability outcomes to exam-style questions, flashcards, and revision notes for Probability.

Revision tools

Flashcards10 linked cards

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Practice Questions7 linked questions

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Paper 1Statistical Techniques1 marks

Description

In probability, different symbols are used to represent the likelihood of events occurring or not occurring.

a
Calculate If P(A) = 0.7, calculate P(A′).
Your answer
Aim for approximately 1 distinct marking point.
[1]

Revision notestopic notes

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