Question

Calculate weighted mean by weighting each price by the quantity consumed:

Food items	Quantity Consumed	Price in Rupees (per Kg)
Flour	500 kg	1.25
Ghee	200 kg	20.00
Sugar	30 kg	4.50
Potato	15 kg	0.50
Oil	40 kg	5.50

Answer 1

Food Item	Price (RS) (X)	Quantity Consumed (W)	WX
Flour Ghee Sugar Potato Oil	1.25 20 4.50 0.50 5.50	500 kg 200 kg 30 kg 15 kg 40 kg	625 4000 135 7.5 220
		ΣW = 785	ΣWX = 4987.5

${\overline{\mathit{X}}}_{\mathit{W}}=\frac{\Sigma WX}{\Sigma W}=\frac{4987.5}{785}=6.35$
Thus, the weighted mean is Rs 6.35.