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Want to learn how to tackle those tough MATHCOUNTS and AMC counting and probability problems? Check out Art of Problem Solving's Introduction to Counting & Probability by David Patrick.

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2005 AMC 10B Problems/Problem 25

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2005 AMC 10B Problems

Retrieved from "http://www.artofproblemsolving.com/Wiki/index.php/2005_AMC_10B_Problems/Problem_25"

Want to learn how to tackle those tough MATHCOUNTS and AMC counting and probability problems? Check out Art of Problem Solving's Introduction to Counting & Probability by David Patrick.

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