In a juice bar, there are 15 different fruit juices and n n\,n different mix-ins. A customer can choose one fruit juice and one mix-in for their drink. Casey says there are 190 different ways to choose a juice and a mix-in.
Could Casey be correct? You must show your working.
181 exam-style questions on Eduqas GCSE Maths The Product Rule for Counting. Each one has a worked solution and a mark scheme showing where the marks go.