Felicity is going to play one game of chess and one game of draughts.
The probability she will win the game of chess is 0.8
The probability she will win exactly one of these games is 1
Work out the probability that Felicity will win the game of draughts.
54 exam-style questions on OCR GCSE Maths Probability Trees. Each one has a worked solution and a mark scheme showing where the marks go.