Year 11 - Maths
Checking and securing displaying outcomes
Conditional probability
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
In this unit, pupils use their knowledge of calculating theoretical probabilities and extend it to calculate conditional probabilities.
Lesson Summary
You will learn to display outcomes in various ways and place outcomes on the probability scale.
Key Notes
- Outcomes can be listed systematically using an appropriate representation
- Outcomes can be placed on the probability scale
- A probability of 0 means the outcome is impossible and a probability of 1 means the outcome is certain
Vocabulary To Learn
- Trial: A trial is a single predefined test.
- Outcome: An outcome is a result of a trial.
- Theoretical probability: A theoretical probability is a probability based on counting the number of desired outcomes from a sample space where all individual outcomes are equally likely.
Common Mistakes To Avoid
- Pupils may omit outcomes or include repetitions of the same outcomes in their lists.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Outcomes can be listed systematically using an appropriate representation. Outcomes can be placed on the probability scale.
2. Use this key word in a maths sentence and explain it clearly. 'Trial'
A trial is a single predefined test. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Pupils may omit outcomes or include repetitions of the same outcomes in their lists. Correction: For each problem, encourage pupils to be systematic with their ordering of outcomes.
More Lessons In This Unit
- Advanced problem solving with conditional probability Study Guide
- Algebra in tree and Venn diagrams Study Guide
- Checking and securing calculating probabilities from diagrams Study Guide
- Checking and securing calculating probabilities from tables Study Guide
- Checking and securing exhaustive events Study Guide
- Combinations Study Guide
- Comparing multiple representations to calculate conditional probabilities Study Guide
- Conditional probability in a tree diagram Study Guide
- Conditional probability in a two-way table Study Guide
- Conditional probability in a Venn diagram Study Guide
- Constructing three event Venn diagrams Study Guide
- Experimental probability Study Guide
- Experimental vs theoretical probability Study Guide
- Frequency trees Study Guide
- Probabilities in three event Venn diagrams Study Guide
- Probabilities involving algebra Study Guide
- Problem solving with conditional probability Study Guide
- Set notation Study Guide
Browse all guides in the Year 11 Maths guide library.