Suppose we must choose 4 rooms out of the 100 rooms in a dormitory. We
randomly choose one each out of rooms
1-25, 26-50, 51-75, and 75-100. This is an
example of:

Mrs. chibas is making chocolate chip cookies for her daughter's class. she bought a tub of chocolate chip cookie dough that contained 57.6 ounces of dough. if each cookie needs 1.2 ounces of dough, how many cookies can she make