Edexcel 1MA1HigherNon-calculatorR5 Sharing in a ratio
Question 1 · 3 marks
Spec and skills
Paper scope: Paper 1: non-calculator practice
Spec R5
Spec R7
Original practice question
Answer and supported method checks
A box contains only red and blue counters in the ratio 3 : 7. After 12 red counters are removed, the ratio is 1 : 3. Work out the original total number of counters. You must show your working.