How many deli trays do you need to have for 100 people?

It depends on the size of the deli trays and the amount of food you plan to serve. Generally, you should plan on one deli tray for every 10-12 people. If you are serving a lot of other food items, you may be able to get away with fewer deli trays. However, if you are only serving deli trays, you should plan on one per 10-12 people.