In the Fall Semester, many high schools hold special events to welcome students back to school and to help the students new to the school get into the spirit of the new year. The Student Council decided to order spirit ribbons for all students to wear at a special assembly. Imagine that you have volunteered to be on the committee, and have been put in charge of findin

Question

How will you determine how many ribbons to order? You could go to all the classes and count every student or you could call the office for the information. But for this question you don't need an exact number. There are always some students absent, and the Student Council doesn't want to spend more money than necessary.

Answer 1

I'd ask the office two things:

How many students are you expecting in the fall?

What percent of them do expect to be present on any given day in the fall?

Answer 2

Sample ten classrooms to see how many students are in the classrooms. Then count all the classrooms.
number=avg/classroom*numberclassrooms.