There are some socks in a drawer. The table shows the number of socks of each colour.
| Colour | Black | White | Grey | Blue |
|---|---|---|---|---|
| Frequency | 11 | 5 | 8 | 6 |
A sock is selected at random.
Write down the probability that the sock is grey.
Write down the probability that the sock is not black.
236 exam-style questions on OCR GCSE Maths Probability. Each one has a worked solution and a mark scheme showing where the marks go.