7 kgs
The amount of chicken curry you make for 100 people varies. If everyone doesn't eat chicken curry then you can make significantly less. It is safe to make enough chicken so that everyone can get two pieces. You should make enough curry to support that amount of chicken.
The amount of boneless chicken you need to make butter chicken for 90 people will depend on whether there are other side dishes. On average you should would work with a single piece per person if you will serve side dishes.
Each bun should have 3 ounces of shredded chicken. For 100 people, you will need 19# of aged chicken.
Most people have no chicken in their back pocket. Storing chicken in your back pocket is very unhealthy and could make you sick.
Allow for about 2 ounces of shredded chicken meat per taco and two taco's per guest. That translates to 25 lbs of pre cooked meat. Always make a small reserve extra for a hungry crowd and allow for wastage and spills. 100 people = approx. 30 lbs of shredded chicken meat.
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None. Roast beef does not contain chicken or chicken by-products.
A big dinner would be half a chicken, so 30 chickens. However, 60 people would probably include children, old folks, and others without big appetites. Perhaps even a few vegetarians. Twenty chickens should be plenty, provided there is other food. If you're talking about egg production, you would want about 150 hens to produce roughly 120 eggs per day. That would give each of 60 people a two egg breakfast.
CHICKEN
About 50 cans from a 4lb chicken
Each chicken is 2.50 so it depends how many you catch
You would need about 1/4 a pound of chicken salad per person. That will be 17.5 pounds of chicken salad for 70 people.