Calculate the arithmetic mean of the following grouped distribution by shortcut method. Class =
10-30 ,30-50 ,50-70 ,70-90, 90-110 ,110-130 Frequency=
5 ,8 ,12, 20 ,3, 2
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Calculate the arithmetic mean of the following grouped distribution by shortcut method. Class =
10-30 ,30-50 ,50-70 ,70-90, 90-110 ,110-130 Frequency=
5 ,8 ,12, 20 ,3, 2
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