The daily amount of water consumed by a species of plant is normally distributed with a mean of 250 ml and a standard deviation of 40 ml.
Find the daily water consumption value that is not exceeded by 95% of the plants. Give your answer to the nearest ml.
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.