The times it takes students to complete a test are normally distributed with a mean of 58 minutes and a standard deviation of 12 minutes.
Find the time by which 90% of students complete the test.
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Markscheme
3.3 The Inverse Normal Distribution Function Questions
21 exam-style questions on Edexcel A Level Maths 3.3 The Inverse Normal Distribution Function. Each one has a worked solution and a mark scheme showing where the marks go.