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Mathematics, 05.02.2020 01:53 jessicaaaamartin
The marks in an examination for a physics paper have normal distribution with mean μ and variance σ2 . 10% of the students obtain more than 75 marks and 20% of them obtained less than 40 marks. find the value of μ and σ
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The marks in an examination for a physics paper have normal distribution with mean μ and variance σ2...
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