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the marks obtained by 1000 students of Saint Gregory's college in a test are normally...

the marks obtained by 1000 students of Saint Gregory's college in a test are normally distributed with a mean Mark of 34.5 and standard deviation of 16.5. find the (I) proportion (I) number; of candidates whose marks are between 30 and 60?
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Asked by O-shock on 25th June, 2020
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