Here is a list of 12 numbers.
1 2 3 4 5 6 8 9 10 11 12 13
One of the numbers is chosen at random.
Write down, as a fraction in its simplest form, the probability that this number is 9.
236 exam-style questions on AQA GCSE Maths Probability. Each one has a worked solution and a mark scheme showing where the marks go.