Question

Frequency distribution of daily commission received by 100 salesmen is given.

Daily commission (in Rs.)	$100-120$	$120-140$	$140-160$	$160-180$	$180-200$
No. of salesman	$20$	$45$	$22$	$9$	$4$

Find mean daily commission received by a salesman.

• A. $136.4$
• B. $140$
• C. $130$
• D. None of these

Answer 1

The correct option is A $136.4$

Rs No.of salesman $x$ $f_x$

$100-120$ $20$ $110$ $2200$

$120-140$ $45$ $130$ $5850$

$140-160$ $22$ $150$ $3300$

$160-180$ $9$ $170$ $1530$

$180-200$ $4$ $190$ $760$

$100$ $13640$

$\overline{x}$ =$\frac{\sum fx}{\sum f}=\frac{13640}{100}=Rs136.4$