There are 200 people at a sports club.
Half of the people at the club are adults.
The number of adults is four times the number of junior members.
The rest of the people at the club are senior members.
the number of senior members : the number of junior members = n:1 n : 1\,n:1
Work out the value of nnn.
You must show how you get your answer.
249 exam-style questions on OCR GCSE Maths Writing and Simplifying Ratio. Each one has a worked solution and a mark scheme showing where the marks go.