There are 8 marbles in a bag.
4 marbles are red. 3 marbles are blue. 1 marble is green.
One marble is selected at random from the bag.
On the probability scale mark with a cross (X) the probability that the marble is red.

On the probability scale mark with a cross (X) the probability that the marble is yellow.

Write down the probability that marble is blue.
18 exam-style questions on Oxford AQA IGCSE Maths Probability. Each one has a worked solution and a mark scheme showing where the marks go.