The scores in a standardized mathematics test are normally distributed with a mean of 75 marks. It is known that 8% of the students score less than 54 marks.
Find the standard deviation of the test scores.
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Markscheme
3.5 Finding the mean and standard deviation Questions
48 exam-style questions on Edexcel A Level Maths 3.5 Finding the mean and standard deviation. Each one has a worked solution and a mark scheme showing where the marks go.