A movie theatre has 3 entrances and 4 exists. In how many ways can a man enter and exit from the theatre?

A hall has four entrances and five exits . In how many ways can a man enter and exit from the hall ?

Kartar goes to a movie. The cinema hall has two entrances and three exits. In how many ways can Kartar enter and exit from the hall ?

In a cinema hall, there are three entrance doors and two exit doors. In how many ways can a person enter the hall and then come out?

In how many ways can 4 letters be posted in 3 letter boxes?

In how many ways can 4 letters be posted in 3 letter boxes?

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

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

In how many ways can 7 letters be posted in 4 letter boxes?