IGCSE Maths / Probability

Tree diagrams with replacement revision notes

Edexcel International GCSE Maths (4MA1), chapter 20: Probability, specification point 6.3a. Part of the full course.

Watch the video lesson · IGCSE Maths past papers

A tree diagram shows the possible outcomes of events in order. With replacement, the item goes back before the next pick, so the probabilities on the branches stay the same.

More lessons in Probability

• The language of probability and the probability scale
• Listing outcomes systematically
• Theoretical probability and sample space
• Relative frequency and mutually exclusive events
• Expected frequency and relative frequency
• Multiplying independent probabilities
• At least one, and the complement
• Tree diagrams without replacement
• Three stage tree diagrams
• Probability problem solving
• Conditional probability from a two way table
• Conditional probability from a Venn diagram
• Conditional probability without replacement
• Forming an equation from a probability