OCR GCSE Mathematics · J560
Specification 11.01a · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Foundation), Paper 4 (Higher), Paper 5 (Higher), Paper 6 (Higher)
Revise: Probability ScaleAt one end, 0 means impossible: the event cannot happen. At the other end, 1 means certain: it must happen. Halfway between them, 0.5 means evens, or an even chance.