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 That can't be right (Hint, Spoiler) by Steve Herman)

Remember, this is a difficulty 1 puzzle; there's a way of solving this without calculus.

Posted by Charlie on 2009-05-11 12:55:43