Experiment and estimate chance
Practise online with Next and Previous buttons, worked explanations and a report of the questions to review.
Log in to continueRepeat a chance experiment, record every trial and compare frequencies.
One-question preview
Choose one answer
Try this sample, or continue to the online quiz for a practice set with Next and Previous buttons.
In 22 trials, an event occurs 4 times. What fraction of the observed trials contain the event?
Show worked steps
Answer: 2/11
- Observed relative frequency = event count ÷ total trials.
- 4/22 = 2/11.
This is a question from this topic’s quiz. Preview answers are not saved.
Scratchpad
Working out
Draw with a finger, pen or mouse, or type your working below.
Your working stays on this page. It is not submitted or saved, and clears when you leave or reload.
Curriculum reference
Victorian Curriculum F–10 Version 2.0
Pi Leo practice scope
Repeat a chance experiment, record every trial and compare frequencies.
Read the official VCAA curriculum description (VC2M5P02)
These quizzes practise concepts within this topic. Multiple-choice answers alone do not demonstrate drawing, conducting an investigation or using a digital tool.
Activities to practise beyond the quiz
- Supported by the guided activity; selecting an MCQ does not demonstrate this action.
- VC2M5P02-C01Relative frequency uses the results actually recorded. It can differ from the theoretical probability even when an experiment is fair.
- VC2M5P02-C02Conducting equally and unequally likely chance experiments and recording observations.
- VC2M5P02-C03Compare observed event fractions using their trial totals and calculate an expected count from a stated probability model.
Learn with worked examples
Help with this topic
Skills in this topic
Traceable coverage
Subskills
These practice subskills map to the curriculum topic. Guided activities cover skills beyond multiple-choice questions.
Descriptor-derived subskills
- D01Use the observed fractionRelative frequency uses the results actually recorded. It can differ from the theoretical probability even when an experiment is fair.
- D02Compare observed rates and model predictionsCompare observed event fractions using their trial totals and calculate an expected count from a stated probability model.