2013 AMC 8 Problems/Problem 12

Problem

At the 2013 Winnebago County Fair a vendor is offering a "fair special" on sandals. If you buy one pair of sandals at the regular price of $50, you get a second pair at a 40% discount, and a third pair at half the regular price. Javier took advantage of the "fair special" to buy three pairs of sandals. What percentage of the $150 regular price did he save?

$\textbf{(A)}\ 25 \qquad \textbf{(B)}\ 30 \qquad \textbf{(C)}\ 33 \qquad \textbf{(D)}\ 40 \qquad \textbf{(E)}\ 45$

Solution

First, find the amount of money one will pay for three sandals without the discount. We have $\textdollar 50\times 3 \text{ sandals} = \textdollar 150$ .

Then, find the amount of money using the discount: $50 + 0.6 \times 50 + \frac{1}{2} \times 50 = \textdollar 105$ .

Finding the percentage yields $\frac{105}{150} = 70 \%$ .

To find the percent saved, we have $100 \% -70 \%= \boxed{\textbf{(B)}\ 30 \%}$

Solution 2

Step 1: Find the total price The first sandal is 50 $. The second sandal is (1-0.4)50$ +1/2*50 $=$ 105 Step 2: Divide by 150 $105/$ 150 = $21/30 = 7/10 = 70%. Step 3: Subtract from 100% to find the amount he saved. 100%-70% = B)30%

-JasonDaGoat

Video Solution

https://youtu.be/VQPKh5hc3xY ~savannahsolver

2013 AMC 8 (Problems • Answer Key • Resources)
Preceded by Problem 11	Followed by Problem 13
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All AJHSME/AMC 8 Problems and Solutions

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2013 AMC 8 Problems/Problem 12

Contents

Problem

Solution

Solution 2

Video Solution

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