Track / Stage 3 / 239 of 260 #239 of 2000

Problem:

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?

Your answer

Check

Show the answer

Official solution

Solution:

$C$ (number of chords) $= C(6) = 132$.

Source: MathNet, licensed CC-BY-4.0. Statement and solution reproduced as published; topic, difficulty and ordering added by this site.