Conditional Probability

Very easy62%

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.

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]

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

[4]

Conditional Probability Questions

Practise Edexcel GCSE Maths Conditional Probability with exam-style questions for Foundation and Higher tier. 28 questions, matched to the Edexcel GCSE Maths (1MA1) 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.