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CAIE IGCSE Mathematics Extended E8.2.2 Calculate Expected Frequencies Questions

Practise Extended CAIE IGCSE Mathematics by converting probabilities or experimental proportions into expected trial counts and population estimates, with sensible rounding.

Syllabus
2028–2030
Course
Mathematics 0580
Level
Extended

Exam points

  • Use a probability or experimental relative frequency to estimate an expected frequency in a fixed number of trials.
  • Calculate an expected population count by multiplying a proportion or probability by the relevant population size.
  • Interpret and report expected frequencies as sensible counts, applying appropriate rounding and context.

CAIE IGCSE Mathematics Extended E8.2.2 Calculate Expected Frequencies Questions question 1

[Maximum number: 1]

A bag contains 5 red balls, 4 blue balls and 3 green balls.

Megan replaces the ball.
She picks a ball at random, notes the colour and replaces the ball.
She repeats this 60 times.
Calculate the number of times the ball is expected to be red or blue.

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