Pick two points at random on a circle and draw the chord connecting them.
Pick two more points and connect them with a second chord.
What is the probability that these chords intersect?
(In reply to re: solution, maybe
In fact, this solution remains the same even if the figure had been a square rather than a circle, as the probability is zero that any chosen point is a corner.
Posted by Charlie
on 2009-05-12 11:10:59