A bag contains 12 blue counters, 9 red counters and 5 green counters. Two counters are removed from the bag at random.
Draw a tree diagram to represent this information
368 exam-style questions on Edexcel A Level Maths Conditional Probability, covering 2.1 Set Notation, 2.2 Conditional Probability, 2.3 Conditional Probabilities in Venn Diagrams, 2.4 Probability Formulae, and 2.5 Tree Diagrams. Each one has a worked solution and a mark scheme showing where the marks go.