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Martian Socks Matching

1150BeginnerPigeonhole PrincipleCombinatorics

AMC 8 · 2005 · Problem 16

A five-legged Martian has a drawer full of socks, each of which is red, white or blue, and there are at least five socks of each color. The Martian pulls out one sock at a time without looking. How many socks must the Martian remove from the drawer to be certain there will be 5 socks of the same color?

Answer choices

A
6
B
9
C
12
D
13
E
15
0 students attempted0% solvedRating 1150

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AMC 8 PracticeMiddle school contest practice with hints and review.What Is a Good AMC 8 Score?Understand AMC 8 results and set the next practice target.AIME Practice StrategyHow to improve accuracy on high-difficulty problems.

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