21FA - 09 Polar Bear Testing

The local zoo is currently experiencing problems with its polar bears: out of a certain number of bears, one has a disease that will eventually make it shrink to the size of an atom. We wouldn’t want that!   There are some number of polar bears, and exactly one of them is sick. To test whether a polar bear is sick, a device can be used to take samples from a subset of polar bears. If one of the