If xerox paper costs 5 cents a sheet and a buyer gets 10% discount on all xerox paper one buys after the first 2000 papers and 20% discount after first 10000 papers, how much will it cost to buy 25000 sheets of xerox paper?
30 sec approach - solve it using approximation
25000 sheet at full price, 5 cent = 1250
25000 sheet at max discount price, 4 cent = 1000
Your ans got to be between these two.
Ans B it is.
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