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2012 AMC 10A Problems/Problem 7

Revision as of 19:13, 8 February 2012 by Ace316 (talk | contribs) (Created page with "In a bag of marbles, <math>\frac{3}{5}</math> of the marbles are blue and the rest are red. If the number of red marbles is doubled and the number of blue marbles stays the same,...")
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In a bag of marbles, $\frac{3}{5}$ of the marbles are blue and the rest are red. If the number of red marbles is doubled and the number of blue marbles stays the same, what fraction of the marbles will be red?

$\textbf{(A)}\ \frac{2}{5}\qquad\textbf{(B)}\ \frac{3}{7}\qquad\textbf{(C)}\ \frac{4}{7}\qquad\textbf{(D)}\ \frac{3}{5}\qquad\textbf{(E)}\ \frac{4}{5}$

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