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UPSC NDA 2 2022 Mathematics Solved Paper

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Consider the following for the next two (2) items that follow :
The mean and standard deviation (SD) of marks obtained by 50 students of a class in 4 subjects are given below:
SubjectMathematicsPhysicsChemistryBiology
Mean Marks40283836
SD15121416
[NDA II 2022]
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