# Math Help - data combination and permutation

1. ## data combination and permutation

In how many ways can 4 students be assingned to 9 classes if there are no restrictions? (ps: it has many situations..)
thank u for help

2. Originally Posted by ives
In how many ways can 4 students be assingned to 9 classes if there are no restrictions? (ps: it has many situations..)
thank u for help
each student has 9 choices so

$9 \cdot 9 \cdot 9 \cdot 9=9^4=6561$

3. ## thank you

thank you, find out u 'r so smart ..
and i ' m so stupid..... such easy question- -