There are 40 marbles in a jar. 12 of the marbles are green. The rest of the marbles are yellow. One of the marbles is taken at random.
Find the probability that the marble is yellow.
Practise OCR GCSE Maths Probability with exam-style questions for Foundation and Higher tier. 100 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.