a housewife uses 10g of wheat, 20 kg of fuel, 5kg of sugar and 2 kg of oil. prices of these items are respectively rs. 1.50 ,50 paise , rs. 2.80 and rs. 10. taking quantites used as weights find out the weighted arithmetic average of these prices.

Items

Quantity

(Weight)

Price

(X)

WX

Wheat

10

1.50

15

Fuel

20

0.50

10

Sugar

5

2.80

14

Oil

2

10

20

 

∑W = 37 

 

∑WX = 59

 

A.M. =  ∑WX/ ∑W = 59/37 = 1.59

Thus, the mean price is Rs 1.59

** Note that we have assumed the quantity of wheat as 10 Kg instead of 10 g 

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