The weight of a bag of sugar, WWW, is modeled by a normal distribution with a standard deviation of 12 g. It is known that P(W<490)=0.2P(W < 490) = 0.2P(W<490)=0.2.
Calculate the mean weight of the bags of sugar.
Practise Edexcel A Level Maths The Normal Distribution with exam-style questions for A Level Maths. 439 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.
