Question

Combinatorics:

1) nine people need to be assigned to nine seats in a row. how many different assignments can be made?

2) nine people need to be assigned to nine seats in a row but now 5 people need o be placed in the left 5 seats and the remaining four people need to be placed in the remaining 4 seats, on the right. how many different assignments can now be made?

3) is there a difference in the two answers? if so, why?

Answer 1

yes,there is difference in the two answer.

Because ,the assignments or arrangements in question 1st and question 2nd are different.