Daily wages (in ₹) of 60 workers in a small factory were grouped into equal class intervals of width ₹100. Parts of the ‘less than’ and ‘more than’ cumulative frequency tables are given below.
(i) ‘Less than’ cumulative frequencies
Upper wage limit (₹): 100 200 300 400 500
Cumulative frequency (<): 5 17 35 — 60
(ii) ‘More than’ cumulative frequencies
Lower wage limit (₹): 0 100 200 300 400
Cumulative frequency (>): 60 — 43 25 5
Answer the following:
(a) Calculate the missing cumulative frequencies in both tables.
(b) Using your results, determine the frequency of each wages class.
(c) Verify that the total number of workers obtained equals 60.