CAIE IGCSE Mathematics Extended Calculating Expected Frequency

Practise multiplying a known probability by repeated trials or scaling an observed sample proportion to estimate a population count.

Syllabus
2028–2030
Objective
E8.2.2
Level
Extended

Exam points

  • multiply the probability of the stated outcome by the given number of replacement trials
  • form a sample proportion and multiply it by the target population to estimate the total count

E8.2.2 Calculate expected frequencies question 1

[Maximum number: 2]

At a festival, 380 people out of 500 people questioned say that they are camping. There are 55300 people at the festival.

Calculate an estimate of the total number of people camping at the festival.

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