2005 AMC 8 Problems/Problem 2
Problem
Karl bought five folders from Pay-A-Lot at a cost of each. Pay-A-Lot had a 20%-off sale the following day. How much could Karl have saved on the purchase by waiting a day?
Solution
Karl paid . of this cost that he saved is .
Solution 2
Each folder can also be dollars, and can be shown as . We can multiply . is also cents or the amount of money that is saved after the discount. So each folder is .Since Karl bought 5 folders all of the folders after the discount is , and the money bought before the discount is . To find the money Karl saves all we have to do is subtract . Thus the answer is .
Solution 3
Having a off sale is equivalent to a "Buy 4 get 1 free" sale. Thus, he would have saved the price of 1 folder, which is .
-JeffersonJ
See Also
2005 AMC 8 (Problems • Answer Key • Resources) | ||
Preceded by Problem 1 |
Followed by Problem 3 | |
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