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CAIE IGCSE Mathematics complementary probability

Practise using complements to find probabilities for events that do not happen, including colour, weather and table-based contexts.

Syllabus
2028–2030
Course
Mathematics 0580
Level
Core

Exam points

  • calculate P(not event) from 1 - P(event), giving the answer as a fraction, decimal or percentage
  • use 'not red' or 'not pink' information to recover individual probabilities in a set
  • complete probability tables by subtracting known probabilities from 1 before sharing a remainder

C8.1.3 Understand that the probability of an event not occurring = 1 – the question 1

[Maximum number: 1]

The probability that it will rain at the wedding is 0.12 .

Find the probability that it will not rain.

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