Two different schools, school A and school B, attended a conference.
12% of the attendees were teachers, the rest were students. 47% of the attendees were from school A. 48% of the attendees were students from school B.
One of the attendees is selected at random. Find the probability that they are a teacher from school A.
38 exam-style questions on Edexcel GCSE Maths Two Way Tables. Each one has a worked solution and a mark scheme showing where the marks go.