There are 10 marbles in a bag. 6 of the marbles are green. 4 of the marbles are yellow. Two marbles are taken at random from the bag.
Work out the probability that one marble of each colour is taken.
You must show your working.
72 exam-style questions on OCR GCSE Maths Conditional Probability. Each one has a worked solution and a mark scheme showing where the marks go.