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Conditional Probability

Conditional Probability

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Question 75

A jar contains 7 yellow marbles, 5 purple marbles, and 8 green marbles. Two marbles are selected at random from the jar without replacement.

a.

Draw a tree diagram to represent this information.

[3]
b.

Find the probability that both marbles selected are purple.

[2]
c.

Given that at least one of the marbles selected is yellow, find the probability that both marbles are yellow.

[3]
Markscheme

Conditional Probability Questions

  1. A Level
  2. /Maths
  3. /Conditional Probability

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.

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