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  4. Mean and standard deviation of marks obtained in some particular subject by four classes are given below. Report the class with best performance

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Q. Mean and standard deviation of marks obtained in some particular subject by four classes are given below. Report the class with best performance

VITEEEVITEEE 2008

Solution:

Performance of the class will be best if mean of the marks obtained is maximum but standard deviation of the marks obtained is minimum.
Hence the class which has mean and standard deviation of the marks obtained as 75 and 5 respectively performs best.