1.

1). Rs. 10.62). Rs. 9.563). Rs. 16.354). Rs. 8.53

Answer»

Given,

There are 100 pens of Rs. 10 and 600 pencil of Rs. 5 and 120 notebooks of Rs. 25 :

⇒ Total COST of 100 pens = 100 × 10 = Rs. 1000

⇒ Total cost of 600 pencil = 600 × 5 = Rs. 3000

⇒ Total cost of 120 notebooks = 120 × 25 = Rs. 3000

The average cost of all items AVAILABLE in a Stationery shop:

Average = (total cost of items)/number of items

⇒ Total cost of 100 pens, 600 PENCILS and 120 notebooks = Rs. (1000 + 3000 + 3000) = Rs. 7000

⇒ Average cost of 100 pens, 600 pencils and 120 notebooks = (7000)/(100 + 600 + 120)

= 7000 / 820

= Rs. 8.53



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