Question: If the arithmetic mean of the data given below is 28, calculate; (i) the missing frequency (ii) the mean deviation of the series; (iii) the

If the arithmetic mean of the data given below is 28, calculate;

(i) the missing frequency

(ii) the mean deviation of the series;

(iii) the standard deviation and coefficient of variation of the series:

Profit (in TK.): 0-10 10-20 20-30 30-40 40-50 50-60

No. of Firms: 12 18 27 X 17 6

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