It depends on how much other food their is. If you're serving a main course where coleslaw is one of a few sides, figure most people won't take seconds (1/4th of less), meaning 1/3lb of coleslaw per person should be plenty. That would place you at around 13lbs (ish).
If you're serving only one side dish, and it's coleslaw, figure each person might eat half a pound, putting you at 20 lbs.
If you have 6+ sides, each person might not even take coleslaw, meaning you'd need even less. 10 lbs should be plenty in this situation.
So, again, it all depends on how much other food there is.
Depends what else they are eating. A normal helping of coleslaw is 4 oz, so 3 lbs for 12 people.
180 For 40 people
it is terrible
I would use 40 pounds.
I would make 12 pounds
40 kilograms = 88.18 pounds.
15 pounds
40 stone = 560 pounds
40 pounds = 640 ounces
40 pounds = 18.144 kilograms.
40 ounces = 2.5 pounds
depending on their appetites between 15 and 25 people!