Five students are getting ready to explain a problem to their math class. Only two of them are willing to be the first to give their explanation. How many ways are there to arrange the five students?

Question

anonymous · Answer

so A and B are the students that want to go first

kropot72 · Answer

There are 2 choices for the first to go. There are 4 choices for the next, 3 choices for the third to go, 2 choices for the fourth to go and only 1 choice for the last. Therefore the number of ways to arrange the five students is given by:
2 * 4 * 3 * 2 * 1 = you can calculate.

anonymous · Answer

the ansqwer is 48