Question

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

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

Answer 1

Salary ($xi$) workers (fi) (xi fi)

3000 16 48,000

4000 12 48,000

5000 10 50,000

6000 8 48,000

7000 6 42,000

8000 4 32,000

9000 3 27,000

10,000 1 10,000

$\sum fi=60$ $\sum fixi=305000$

Mean $=\frac{\sum fixi}{\sum fi}$

$=\frac{305000}{60}$

$=5083.33$