Question

I went to a shop to purchase some refills costing Rs. 1.60 each but the clerk did not have change for my 20 rupee note. I was constrained to purchase some 30 paise labels as
well so that no money needed to be returned. After purchasing the maximum number of refills under the given constraints, how many labels did I have to purchase?​

Answer 1

Answer:

Maximum no. possible refill purchase is [20/1.6]=12. But in that case the clerk have to retrun 80 paise which is the cost of more than 2 label but less than 3 label. So it is not possible to purchase 12 refills. Let say you purchase 11 refills which cost 1.60*11= 17.6 rupees and then you can buy 8 labels with the rest (20-17.6)=2.4 rupees. So you have to purchase 8 labels.