The time, T T\,T minutes, taken to commute to work is normally distributed with a standard deviation of 6.4 minutes. Given that P(T<45)=0.7P(T < 45) = 0.7P(T<45)=0.7.
Find the mean commute time.
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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.