Question

Find the mean of daily wages of 60 workers in a factory as per data given below:

Daily wages (in Rs)	90	110	120	130	150
No. of workers	12	14	13	11	10

Answer 1

Daily Wages (xi)	No. of Workers (fi)	(fi)(xi)
90	12	1080
110	14	1540
120	13	1560
130	11	1430
150	10	1500
	$\sum _{}^{}{f}_i=$60	$\sum _{}^{}{f}_i{x}_i=$7110

Thus, we have:

$\mathrm{Mean}=\frac{{\displaystyle \sum _{}^{}}{f}_i{x}_i}{{\displaystyle \sum _{}^{}}{x}_i}$

$=\frac{7110}{60}=\mathrm{Rs}118.50$