8 Out of 10 (Brown) Cats

I visited a cat shelter one day with the intention to adopt a few cats. The shelter had 50 cats; 25 of them were black, 10 were brown and 15 whites. The shelter worker was colour blind but he had some other techniques to distinguish the colour of the cats. The techniques are, however, not perfect.

Photo by Pacto Visual on Unsplash

I told the worker that I wanted to adopt 10 brown cats. He knew there were 10 and he had to find all 10 for me for a 100%…