This exam tips covers Exam Tips within Expected Frequency for GCSE Mathematics. Revise Expected Frequency in Probability for GCSE Mathematics with 14 exam-style questions and 12 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 4 of 5 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.
Topic position
Section 4 of 5
Practice
14 questions
Recall
12 flashcards
Exam Tips
- Use the formula - Expected frequency = Probability × Number of trials
- Be clear about probability - use experimental or theoretical as appropriate
- Round sensibly - you can't have 15.7 people, so round to 16
- Show your working - write the probability and number of trials clearly
- Check reasonableness - does your answer make sense?
Keep building this topic
Read this section alongside the surrounding pages in Expected Frequency. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Expected Frequency
Which formula correctly gives the expected frequency of an event?
A fair coin is flipped 50 times. The expected number of heads is 25. In the actual experiment, only 18 heads are recorded. Explain why the actual number of heads may differ from the expected number of heads.
Quick Recall Flashcards
14 questions on Expected Frequency — practise free
Instant marking, adaptive difficulty, and 12 spaced repetition flashcards. Free until your GCSEs.
Try PrepWise Free