This is a complete lesson on conditional probability that looks at how to work out conditional probabilities and how to use them to determine whether two events are independent. The lesson is designed with the new GCSE specification in mind.

- To be able to calculate conditional probabilities.
- To use conditional probabilities to decide whether two events are independent.

This pack is designed for GCSE higher tier students. It could also be used with high ability Key Stage 3 students.

Included in this download are the following:

- Full lesson plan for the ‘Conditional Probabilities’ lesson, including introduction, teaching content, individual activities, plenary and suggested support and extension activities
- Conditional Probability Example
- Example Two Way Table
- Student Worksheet on Conditional Probabilities
- Probability Fact Sheet
- Complete Solutions to all Questions

This is the eighth lesson in the Probability (Higher Tier) unit of work (the unit is also **available as a pack** including homework activities and a unit assessment).

The other lessons in the unit are:

**Lesson 1 – Calculating Probabilities****Lesson 2 – Experimental & Theoretical Probability****Lesson 3 – Relative Frequency & Expected Frequency****Lesson 4 – Sample Space Diagrams****Lesson 5 – Probabilities of Independent Events****Lesson 6 – Probability Trees (With Replacement)****Lesson 7 – Probability Trees (Without Replacement)****Lesson 9 – Probability & Venn Diagrams**