There are 12 discs in a box. 6 discs are red. 5 discs are blue. 1 disc is white. One disc is picked at random from the box.
On the probability scale mark with a cross (X) the probability that the disc is red.
On the probability scale mark with a cross (X) the probability that the disc is green.
Write down the probability that the disc 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.
