CAIE IGCSE Mathematics Core Frequency and Expectation

Practise turning trial results into relative frequencies and using probabilities to predict expected counts over repeated trials or a stated population.

Syllabus
2028–2030
Topic
C8.2
Level
Core

Exam points

  • calculate relative frequency as observed successes divided by the number of completed trials
  • estimate an expected count by multiplying an event probability by the stated trials or population
  • interpret replacement and repetition wording so the same probability applies on every trial

Covered syllabus points

C8.2.1 Understand relative frequency as an estimate of probability.C8.2.2 Calculate expected frequencies

C8.2 Relative and expected frequencies question 1

[Maximum number: 1]

Kim has a 6-sided spinner numbered 1 to 6 .
She spins it 63 times and her scores are shown in the table.

Table for Question C8.2 Relative and expected frequencies question 1 — CAIE IGCSE Mathematics Core

Find the relative frequency of scoring a 5 with this spinner.

C8.2 Relative and expected frequencies question 2

[Maximum number: 1]

Hemang buys two televisions.

The probability that a television is faulty is 0.02 .

Figure for Question C8.2 Relative and expected frequencies question 2 — CAIE IGCSE Mathematics Core

The shop sells 4150 televisions in one year.

Calculate the expected number of faulty televisions.

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