There are 12 students in a classroom.
Every student shakes hands with every other student exactly once.
Work out the total number of handshakes that take place.
Practise AQA GCSE Maths The Product Rule for Counting with exam-style questions for Foundation and Higher tier. 68 questions, matched to the AQA GCSE Maths (8300) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.