There are 8 counters in a bag. 5 of the counters are red. 3 of the counters are blue. Two counters are taken at random from the bag.
Verify that the probability that one counter of each colour are taken is 1528\displaystyle \frac{15}{28}2815.
You must show your working.
72 exam-style questions on CCEA GCSE Maths Conditional Probability. Each one has a worked solution and a mark scheme showing where the marks go.