Problem 1.
In how many ways can four letters be put into three mailboxes?
(More than one letter can be put in the same mailbox.)

SOLUTION


| Problem 1 | Problem 2 | Problem 3 | Problem 4 | Problem 5 |
| Problem 6 | Problem 7 | Problem 8 | Problem 9 | Problem 10 |

RETURN
- Last Updated: 12/10/08