This mostly depends on the size of the pizzas. If you have seven medium pizzas, it's likely that you won't have enough Pizza for everyone. But if they are large pizzas, you'll have enough to feed almost everyone half a pizza. Taking into account the fact that most people probably won't eat half a pizza, if you have seven, you should actually have more than enough, which is fine, considering the fact that you don't want to run out.
A large Papa John's pizza will feed 3-4 adults. Their most popular combination of toppings is pepperoni, sausage and mushrooms.
A pizza typically contains about 8-10 slices. If it's just for a snack, two pizzas should be enough for everyone to have at least one slice. If a meal, 4 pizzas will allow 13 people to have at least 2 slices, with some extra for hungry people.
A 6.5 pound turkey will feed 6 adults. The rule with turkey, is there should be 1 lb. of turkey for every adult.
A 7.5 pound turkey breast is not enough to feed 11 people. An 11 pound turkey would be enough to feed 11 adults.
Four pizzas
about for adults 6 or 7
16
A large Costco pizza typically has 12 slices. If you have 50 children and each will eat 2 slices, that amounts to 100 slices needed in total. Dividing 100 slices by 12 slices per pizza means you would need about 8.3 pizzas, so you should order 9 large pizzas to ensure everyone is fed.
4
4 pizzas
82
There are approximately 6 serving of turkey in a 6 pound bone in turkey. The turkey should feed about 6 adults.