The daily amount of water consumed by a plant of a certain species, in millilitres, is Normally distributed with mean 250 ml and standard deviation 40 ml.
Find the daily water consumption that is not exceeded by 95% of these plants. Give your answer to the nearest millilitre.
351 exam-style questions on AQA A Level Maths 2.4.2 The Normal distribution (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.