Question

Mary has 3 books to arrange on a shelf. She has a math book, history book, & science book. Which of the following shows all the possible combinations for her to arrange the books?

f. history/math/science; history/science/math
g. History/Math/science; History/science/math;Math/history/science; math/science/history

h.history/math/science;history/science/math;math/history/science;math/science/history science/math/history;science/history/math
j. history/math/science;history/science/math;science/math/history;science/history/math

Answer 1

3! = 3x2x1 options = 6.

HMS
HSM
MSH
MHS
SMH
SHM

Answer 2

6 Ways
H S M
H M S
M H S
M S H
S H M
S M H