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HMMT 二月 2001 · 冲刺赛 · 第 11 题

HMMT February 2001 — Guts Round — Problem 11

专题
Contest Math / 竞赛数学
难度
L3
来源
HMMT

题目详情

英文原题

  1. [8] 12 points are placed around the circumference of a circle. How many ways are there to draw 6 non-intersecting chords joining these points in pairs?
解析

英文解析

  1. [8] 12 points are placed around the circumference of a circle. How many ways are there to draw 6 non-intersecting chords joining these points in pairs?
    Solution: C (number of chords) = C (6) = 132 . 2