Ralph's t-shirt shop is having a once-a-year sale. If you buy one t-shirt, you receive the second one for 20% off, the third one for 25% off, and so on. How many t-shirts would you have to buy to receive a free shirt?
1 Answer
Apr 1, 2018
15 shirts
Explanation:
For the first t-shirt bought, you get 20% off of the second one. 5% gets taken off for each additional t-shirt.
100%(free shirt)-20%(amount off of 2nd shirt)=80%
80/5=14
14+1(first shirt)= 15 shirts
