120 students are asked whether they like biology or chemistry or physics best.
52 of the students are in year 11, the rest are in year 10. 45 students like physics best. 20 of the year 11 students like biology best 16 of the 30 students who like chemistry best are in year 10.
Work out how many year 10 students like physics best.
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.