The heights of a certain species of plant are normally distributed with a mean of 42 cm and a standard deviation of 8 cm.
Find the height such that 80% of the plants are shorter than this value.
149 exam-style questions on OCR (MEI) A Level Maths 2.4.12 Calculate probabilities from a Normal distribution (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.