Question 20Two points on the circumference of a circle of radius $r$ are selected independently and at random. From each point a chord of length $r$ is drawn in a clockwise direction. What is the probability that the two chords intersect?$\dfrac{1}{6}$$\dfrac{1}{5}$$\dfrac{1}{4}$$\dfrac{1}{3}$$\dfrac{1}{2}$