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8. Calculate the arithmetic mean of the following frequency distribution by Direct Method: Class Interval 10-20 20-40 40-70 70-120 120-200 Frequency 10 26 2

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8. Calculate the arithmetic mean of the following frequency distribution by Direct Method: Class Interval 10-20 20-40 40-70 70-120 120-200 Frequency 10 26 2

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