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 OCR GCSE Maths Probability with exam-style questions for Foundation and Higher tier. 212 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers 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.
