Practise OCR (MEI) A Level Maths 2.4.13 Model with probability distributions with exam-style questions for A Level Maths. 68 questions, matched to the OCR (MEI) A Level Maths (H640) specification and written in Component 01, Component 02 and Component 03 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.