Question

How many different arrangements of letters can be formed if the letter must be repeats of letters are allowed?

Answer 1

There is 2 possibility for the first letter from the left.

Then there are 2 possibilities for the second letter. Then and so on till the 5-th letter.

In this way, you will get

`2^{5\text{ }}=32`

Each is unique, and each is achievable in this way.

There are no other arrangements. So that, we can conclude that the correct answer is:

`32`