All Questions

Three Rings

00:00:00

Parts

Part 1

Part 2

You are shooting arrows at a target with three rings: there is a circle with a 4 inch radius, a ring around it with an 8 inch radius, and a ring around that with a 12 inch radius. Each arrow hits the target somewhere uniformly at random.

What’s the probability that you land exactly one arrow in each of the three rings?