There are 11 pens in a box.
5 pens are red. 4 pens are blue. 2 pens are green.
One pen is selected at random from the box.
Write down the probability that pen is green.
Write down the probability that pen is black.
18 exam-style questions on Oxford AQA IGCSE Maths Probability. Each one has a worked solution and a mark scheme showing where the marks go.