A variable X X\,X is normally distributed with a standard deviation of 1.8. Given P(X<25)=0.22P(X < 25) = 0.22P(X<25)=0.22, find the mean of XXX.
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Markscheme
2.4.2 The Normal distribution (A-level only) Questions
351 exam-style questions on AQA A Level Maths 2.4.2 The Normal distribution (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.