3 letters are to be posted in 5 letter boxes in a part of the town .IF all letters are not posted in the same letter box . The number of ways of posting is

In how many ways can 3 letters be posted in four letter boxes in a village ? If all the three letters are not posted in the same letter box. Find the corresponding number of ways of posting.

5 letters can be posted into 3 letter boxes in:

5 letters can be posted into 3 letter boxes in:

In how many ways 3 letters can be posted in 4 letter-boxes,if all the letters are not posted in the same letter-box

There are 4 letters and 5 boxes in a row. Number of ways of posting these letters if all the letters are not posted in the same box is

There are 4 letters and 5 boxes in a row. Number of ways of posting these letters if all the letters are not posted in the same box is

In how many ways 5 letters can be posted in 4 letter boxes?

There are 4 letters and 5 boxes in a row. Number A of ways of posting these letters if all the letters are not posted in the same box is

6 letters are to be posted in three letter boxes. The number of ways of posting the letter when no letter box remains empty is