How many pounds of beef tenderloin to buy for 12 people?

that depends on how much they eat.

Answer:

Always consider the size of meat cuts you get when you dine out. t helps when you size meals at home.

Most restaurants serve filets mignon in 6 to 8 oz. sizes for each diner. If the meal is in accordance with healthy eating norms found in guides like "The Canada Food Guide" the amounts will be much smaller as a serving of beef is usually about 3 ounces.

A beef tenderloin is essentially an uncut series of filet mignons. So 10 people can be expected to eat about 5 lbs of beef tenderloin.

More if they are big eaters, much less if they are vegans.