A factory produces bags of flour. The weight of flour, WWW grams, in a bag can be modelled by a normal distribution with mean 505 grams and standard deviation 4 grams.
Find P(W<498)P(W < 498)P(W<498).
Find the value of www such that P(505<W<w)=0.35P(505 < W < w) = 0.35P(505<W<w)=0.35.
Two bags of flour are selected at random.
Find the probability that exactly one of the bags contains between 505 grams and www grams of flour.
616 exam-style questions on Edexcel A Level Maths The Normal Distribution, covering 3.1 The Normal Distribution, 3.2 Finding Probabilities for Normal Distributions, 3.3 The Inverse Normal Distribution Function, 3.4 The Standard Normal Distribution, 3.5 Finding the mean and standard deviation, 3.6 Approximating a Binomial Distribution, and 3.7 Hypothesis Testing with the Normal Distribution. Each one has a worked solution and a mark scheme showing where the marks go.