1. Three students, Andy, Beth, and Cara, must arrange their desks in a row in their classroom. Your job is to figure out how many different arrangements they can make. Make a list of all possible arrangements. How many arrangements are possible?
2. Dana is added to the group of students in #1 above, so you now have to arrange four students in a row. How many arrangements are possible? Justify your answer.
(Permutation)
2. Dana is added to the group of students in #1 above, so you now have to arrange four students in a row. How many arrangements are possible? Justify your answer.
(Permutation)
Answers & Comments
Answer:
1. 3×2×1= 6 therefore 6 ways
2. 4×3×2×1= 24 ways.
use the fundamental principles of counting!