Question

Find the mean salary of $60$ workers of a factor from the following table:

Salary (in Rs)	Number of workers
3000	16
4000	12
5000	10
6000	8
7000	6
8000	4
9000	3
10000	1
Total	60

Answer 1

We have prepare a table for finding the mean salary

Salary (in Rs.) $\left(x\right)$	No of workers $\left(f\right)$	$fx$
$3000$ $4000$ $5000$ $6000$ $7000$ $8000$ $9000$ $10000$	$16$ $12$ $10$ $8$ $6$ $4$ $3$ $1$	$48000$ $48000$ $50000$ $48000$ $42000$ $32000$ $27000$ 10000$
	$\sum f=60$	$\sum fx=3,05,000$

$\therefore$ we know mean $=\frac{\sum fx}{\sum f}=\frac{3,05,000}{60}$

$=5083.33$

$\therefore$ mean salary of $60$ workers $=5083.33$