The mass of newborn kittens in a specific breed is normally distributed.
20% of the kittens have a mass of less than 85 grams. 12% of the kittens have a mass of more than 115 grams.
Find the mean and standard deviation of the masses.
Practise Edexcel A Level Maths Finding the mean and standard deviation with exam-style questions for A Level Maths. 48 questions, matched to the Edexcel A Level Maths (9MA0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
