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Relative frequency estimates probability from experimental results, as successes ÷ trials, improving as the number of trials increases. It's a core topic in GCSE and iGCSE Maths with Edexcel and the other major boards. This free interactive course teaches the method with worked examples and gives instant-feedback practice questions to lock it in.
How you do it
Divide the number of times the outcome happened by the number of trials. The more trials, the closer this gets to the true probability. Multiply by the number of trials to predict how often it will happen again.
Before you start
It draws heavily on basic probability and fractions. You meet it at Foundation and Higher tier. It underpins expected frequency and experimental data.
What you learn
When we can’t simply count equally likely outcomes, we estimate a probability from an experiment using relative frequency. This is also called the experimental probability. The more trials you carry out, the closer the relative frequency tends to get to the true probability. The course works through relative frequency, more trials, better estimate and judging fairness. Every section has instant-feedback practice questions matched to Edexcel iGCSE 4MA1 and the other major GCSE boards, and the course finishes with full exam-style questions you mark yourself.
Related Topics
We teach Relative Frequency as one of the Probability topics in our GCSE course library, at Foundation tier. It runs to 3 concepts, each followed by a check, with 2 worked examples along the way. Students often pair it with Sample Space Diagrams, Tree Diagrams and Two-Way Tables. You can drill this strand further on the Probability revision engine, with your accuracy saved to your skill tree.
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