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Help guys!! The question is from class 11 Economics...answer only if u know....i don't want any absurd answers plz...ty... Calculate the arithmetic mean of

average daily wage by step deviation method. Use this formula( X bar = Summation fd' ÷ Summation f * Common factor) Daily wages (X): 2-4 4-6 6-8 8-10 10-12 12-14 14-16 16-18 No.of workers(f) 11 14 20 32 25 7 5 2

Its easy take mid value of class (daily wages)..then take assumed mean (a)..of 8-10 class interval then multiply assumed mean with frequency by applying the answer

Calculate mid-pt. of each CI and denote it by m.
Decide any 1 mid-pt. as assumed mean (A).
Calculate deviations (d) of mid-pt. from A i.e., d=m-A.
Find out common factor (C) from d and calculate d' which is d/C.
Multiply step deviation d' with frequency (f) and obtain the total to get Summation fd'.
Find out total no. of items in a series i.e., Summation f or N.
Apply the following formula,
X= A+ Summation fd'/Summation f * C
Hope i helped :)