Question

Calculate the arithmetic mean using Assumed mean method.

• A. $62.5$ rupees
• B. $61.5$ rupees
• C. $64.5$ rupees
• D. $65.5$ rupees

Answer 1

The correct option is A $62.5$ rupees

Answer:- By shortcut Method

Wages (X)	Workers (F)	d=X-A	Fd
20	1	-40	-40
40	3	-20	-60
60=A	5	0	0
80	7	20	140
	$\Sigma f=16$		$\Sigma fd=40$

Mean = $A+\frac{\Sigma fd}{\Sigma f}=60+\frac{40}{16}=60+2.5=62.5$

A)62.5