The mass of apples produced in an orchard follows a normal distribution with a mean of 120 g and a standard deviation of 15 g.
Find the probability that the mass of an apple is:
More than 135 g
Less than 105 g
Between 105 g and 135 g
328 exam-style questions on WJEC A Level Maths 4.2 Statistical distributions (A-level only), covering 4.2.1 Statistical distributions (A-level only), 4.2.2 Statistical distributions (A-level only), and 4.2.3 Statistical distributions (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.