How many slabs of ribs to cook for 50 people?

When cooking ribs for a group, a general guideline is to serve about half a slab per person, as ribs are typically a part of a larger meal. For 50 people, you would need approximately 25 slabs of ribs. If your meal includes other substantial sides or dishes, you might consider reducing that number slightly, but 25 slabs is a safe estimate for a generous serving.