The mean and standard deviation marks of 4 different classes of the same grade are recorded n the table below. Mean mark Standard deviation 83 Class 1 Class 2 Class 3 Class 4 78 5 71 14 64 Jsing the coefficient of variation, determine which class has marks that more spread out about he mean. A. Class 1 B. Class 2 C. Class 3 D. Class 4

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