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.
Practise CIE IGCSE Maths Probability with exam-style questions for Core and Extended tier. 34 questions, matched to the CIE IGCSE Maths (0580) specification and written in Paper 1 and Paper 3 (Core) or Paper 2 and Paper 4 (Extended) 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.