Employees from two offices, Office A and Office B, attended a joint training session.
20% of the attendees were managers, the rest were staff. 42% of the attendees were from Office A. 45% of the attendees were staff from Office B.
One of the attendees is selected at random. Find the probability that they are a manager from Office 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.