I would use 150 cans
Lennie and George share one can of beans.
10
Are they only eating beans or it a single veg as part of a dinner meal.How can we give a reasonable answer if you don't give us all the facts.
a 10 lb can of green beans will feed 50 people with 3 oz portions.
Approximately 5 cans of 16 oz beans make 4.5 liters.
You need about 10 twenty eight ounce cans
presumably they are having other food also. So 10 people should use 3 can of beans
One normal size can would do 2-3 people, depending on how big a portion they want.
To determine the number of institutional size cans of green beans needed to feed 100 people, we first need to establish the serving size per person. Let's assume a standard serving size of 1/2 cup of green beans per person. With 100 people to feed, that would amount to 50 cups of green beans in total. Institutional size cans typically contain around 6-7 cups of green beans, so you would need around 8-9 cans to feed 100 people a 1/2 cup serving of green beans each.
17 cans
30 14.5 oz cans