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
228 exam-style questions on CCEA A Level Maths 4.5.1 Statistical distributions (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.