Keith, Annie, Elizabeth, and Marcus are taking a picture. How many different ways can the friends stand in a horizontal line?

Answer 1

Each person can stand 4 different ways I believe So I'm thinking 16 different ways all together.

Answer 2

The number of ways is
4 x 3 = 12

(4 differenct people can be placed in the 1st spot, leaving 3 remaining people to fill the 2nd place)

Answer 3

then there are 2 to fill the third place
24