The number of ways they can stand in a line will be 2 that is either Addison or Gavin can line up one behind the other.
A permutation is an act of arranging the objects or elements in order. Combinations are the way of selecting objects or elements from a group of objects or collections, in such a way the order of the objects does not matter.
Two students, Addison and Gavin, line up one behind the other.
Then the number of ways they can stand in a line will be
There is 2 possibility that either Addison can stand behind or Gavin.
More about the permutation and the combination link is given below.
https://brainly.com/question/11732255
