There are 144 people in a school canteen.
Half of the people in the canteen are year 11 students.
The number of year 11 students in the canteen is n n\,n times the number of year 10 students.
The rest of the people in the canteen are year 9 students.
the number of year 9 students : the number of year 10 students = 5:1 5 : 1\,5:1
Work out the value of nnn.
You must show how you get your answer.
249 exam-style questions on Eduqas GCSE Maths Writing and Simplifying Ratio. Each one has a worked solution and a mark scheme showing where the marks go.