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Conditional Probability

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Question 1
62%

There are only red marbles and green marbles in a bag. There are 6 red marbles and 4 green marbles.

Mason takes at random a marble from the bag. He does not put the marble back in the bag.

Mason takes at random a second marble from the bag.

a.

Complete the probability tree diagram.

A probability tree diagram for two marbles. The first marble has two branches: Red and Green, each with a dotted line for probability. The second marble has four branches: Red, Green, Red, and Green, each with a dotted line for probability.

[2]
b.

Work out the probability that Mason takes two marbles the same colour.

[4]

Conditional Probability Questions

  1. GCSE
  2. /Maths
  3. /Conditional Probability

Practise AQA GCSE Maths Conditional Probability with exam-style questions for Foundation and Higher tier. 28 questions, matched to the AQA GCSE Maths (8300) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

Question bank

Surds
Bounds
Direct and Inverse Proportion
Quadratic Formula
Factorising Harder Quadratics
Algebraic Fractions
Rearranging Harder Formulae
Trigonometric and Exponential Graphs
Inverse and Composite Functions
Iteration
Finding the Area of Any Triangle
The Sine Rule
The Cosine Rule
Congruent Triangles
3d Pythagoras and Trigonometry
Histograms
Conditional Probability