How many cans of collard greens to feed 200 people?

It depends on the size of the cans and how much collard greens you want to serve each person. A standard can of collard greens is 15 ounces, and it will typically serve 2-3 people. So, to feed 200 people, you would need approximately 67 cans of collard greens. However, if you want to serve a more generous portion, you may want to purchase closer to 100 cans.