AMC 8 2005 Problem 16
AMC8 2005 年第 16 题
鸽巢原理与策略★★★☆☆
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?
一个五条腿的火星人有一个装满袜子的抽屉，每只袜子都是红色、白色或蓝色，每种颜色至少有五只袜子。火星人每次从抽屉只拿出一只袜子，且不看取出的是什么颜色。则火星人必须从抽屉里拿出多少只袜子才能确保会有 5 只相同颜色的袜子？
- A.6
- B.9
- C.12
- D.13
- E.15
正确答案 · Correct Answer
D
解析 · Solution
解析整理中
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