CAIE IGCSE Mathematics Extended Probability Basics

Practise extracting favourable counts from data displays, calculating single-event probabilities and using complements for events described with 'not'.

Syllabus
2028–2030
Topic
E8.1
Level
Extended

Exam points

  • select the favourable count from a table, Venn diagram or list and divide by the stated total
  • translate conditions joined by and into the exact intersection or category required by the event
  • find a not-event by subtracting the complementary event probability from 1 when efficient

Covered syllabus points

E8.1.1 Understand and use the probability scale from 0 to 1.E8.1.2 Understand and use probability notation.E8.1.3 Calculate the probability of a single event.E8.1.4 Understand that the probability of an event not occurring = 1 – the

E8.1 Introduction to probability question 1

[Maximum number: 2]

Question (a)

(a)
Figure for Question (a) — CAIE IGCSE Mathematics Extended

The diagram shows 11 cards.

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Question (i)

(i)

One of these cards is chosen at random.
Write down the probability that the letter on the card is not A.

[ 1 ]

Question (b)

(b)
Figure for Question (b) — CAIE IGCSE Mathematics Extended

50 students are asked if they like English ( E ) and if they like mathematics ( M ). 3 say they do not like English and do not like mathematics.
33 say they like English.
42 say they like mathematics.

[ 1 ]

Question (i)

(i)

A student is chosen at random.

Find the probability that this student likes English and likes mathematics.

[ 1 ]
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