A fruit basket contains 12 apples, 9 oranges, and 4 pears. Two pieces of fruit are picked from the basket at random without replacement.
Draw a tree diagram to represent this information.
Find the probability that the two pieces of fruit picked are both pears.
Given that at least one of the pieces of fruit picked is an orange, find the probability that both pieces are oranges.
111 exam-style questions on WJEC A Level Maths 4.1.1 Probability (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.