Question

Find the mean of daily wages of 40 workers in a factory as per data given below:

Daily wages (in ₹) (xi)	250	300	350	400	450
Number of workers (fi)	8	11	6	10	5

Answer 1

We know that,
Mean = $\frac{{\displaystyle \sum _{}{x}_i{f}_i}}{\sum _{}{f}_i}$

For the following data:

Daily wages (in ₹) (xi)	250	300	350	400	450
Number of workers (fi)	8	11	6	10	5

Mean = $\frac{\left(250\times 8\right)+\left(300\times 11\right)+\left(350\times 6\right)+\left(400\times 10\right)+\left(450\times 5\right)}{8+11+6+10+5}$
= $\frac{2000+3300+2100+4000+2250}{40}$
= $\frac{13650}{40}$
= 341.25

Hence, the mean of daily wages of 40 workers in a factory is 341.25 .