Question

Consider the following distribution of daily wages of 50 workers of a factory :

Daily wages (in Rs)	500-520	520-540	540-560	560-580	580-600
Number of workers	12	14	8	6	10

Find the mean daily wages of the workers of the factory by using an appropriate method.

Answer 1

Daily wages	No.of workers	Mean
500-520	12	510
520-540	14	530
540-560	8	550
560-580	6	570
580-600	10	590

Mean wages$=\frac{510\times 12+530\times 14+550\times 3+510\times 6+590\times 10}{12+14+8+6+10}=Rs545.2$