2005 AMC 12B Problems/Problem 1

Problem

A scout troop buys $1000$ candy bars at a price of five for $2$ dollars. They sell all the candy bars at the price of two for $1$ dollar. What was their profit, in dollars?

$\mathrm{(A)}\ 100 \qquad \mathrm{(B)}\ 200 \qquad \mathrm{(C)}\ 300 \qquad \mathrm{(D)}\ 400 \qquad \mathrm{(E)}\ 500$

Solution

$2=0.1x \Rightarrow x=20$ .

$2=0.2y \Rightarrow y=10$ .

$\therefore x-y=20-10=\boxed{10}$ .

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2005 AMC 12B Problems/Problem 1

Problem

Solution

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