The table shows the grade level and number of students participating in a dance
class after school.
Grade. Students
6th 63
7th 44
8th. 25

If the dance instructors choose one student
at random to assist them, what is the
probability the chosen student will not be a
seventh grader?

At the county fair, animals are judged for the quality of their breeding and health. the animal pens are arranged in an array, with one animal in each pen. a barn can hold at most 10 rows of pens and at most 6 pens in each row, with room for people to walk around them. what different ways can the planners of the county fair arrange the pens for the horses and cows in the same barn?