How many tokens do the survivors require in The Séance in Betrayal at House on the Hill?
Basically, it's saying you can do either token as you want. The number of either token must equal the given amount (this changes on different haunts).

Let's say you need number of tokens = number of players (6 in this example) to win. You can have 3 knowledge and 3 sanity, 2 knowledge and 4 sanity, or just all 6 knowledge. Those are all valid conditions.

The instruction to set them aside is just to get them out of your storage area for easy access (and as I explained earlier, some tokens could be used more than others).