The weights of a certain variety of apple are normally distributed with a mean of 150 g and a standard deviation of 20 g.
Find the weight below which 85% of these apples fall. Give your answer to the nearest gram.
292 exam-style questions on WJEC A Level Maths 4.2.2 Statistical distributions (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.