Probability.
Describe single-stage chance, calculate probabilities and predictions, and interpret physical and digital experiment results.
Work through the topic
Learn the method, follow the examples, then try the worksheet.
- 01
Outcomes and sample spaces
Describe a random trial, list all possible results and identify the outcomes belonging to an event.
- 02
Equally likely versus unequal outcomes
Recognise equal and unequal chances, using counter counts and the size of spinner sectors.
- 03
Theoretical probability
Calculate exact chances by counting equally likely outcomes, then compare their fraction, decimal and percentage forms.
- 04
Expected frequencies
Predict an expected count from a probability, and explain why actual counts need not equal the prediction.
- 05
Conducting single-stage experiments
Plan and record a repeatable single-stage chance experiment, with rules chosen before seeing its results.
- 06
Relative frequency
Turn an observed count into a relative frequency and compare or combine experimental records fairly.
- 07
Digital simulations and explaining differences from predictions
Build a digital chance model and interpret supplied simulation results, including variation between runs.
Topic review
Revisit the key ideas, then choose a practice paper.