To serve 40 people 4 ounces each of potato salad, one needs to make approximately 10 pounds of it. When planning food per person for a large gathering, the serving portion for each person should be one pound.
This pound of food should be four servings of four ounces each from the four food groups that include meat, potato or macaroni salad, other vegetables like beans or carrots and a dessert.
Potato salad, macaroni salad and coleslaw are popular foods to serve a large group of people. To make potato salad for a party with 40 guests, the ingredients one needs are 10 pounds of potatoes, about 24 eggs, 4 cups of mayonnaise and seasonings or spices such as salt, black pepper and mustard.
The normal serving is considered to be 4 ounces. 25 pounds would feed 100 people. If they are hungry you may want to go a bit more than that. It takes about 5-6 potatoes to feed 4
Id use 15 pounds.