Sarah invests £1200 \pounds 1200\,£1200 for 4 years in a savings account. The account pays simple interest at a rate of 3% per year. Work out the total amount of interest Sarah has earned at the end of 4 years.
Practise OCR GCSE Maths Percentages with exam-style questions for Foundation and Higher tier. 76 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.