In how many of ways can 4 balls be placed in 5 tins if any number of balls can be placed in any tin? Choose the most appropriate option:  A) 5C4  B) 5P4  C) 54  D) 4^5  E) 5^4
Now, each of the 4 different balls has 5 choices (5 tins to go to), so total # of distribution is 5*5*5*5=5^4.   Answer: 5^4.
<result>E</result>
In how many of ways can 4 balls be placed in 5 tins if any number of balls can be placed in any tin?