Question

Given a four digit number XXXX, are there more permutations if repetition is allowed or not allowed? Explain your answer.

Answer 1

Answer:

There are more permutations when repetitions are allowed.

Explanation:

There are more permutations if repetition is allowed because in this case, we can include numbers like 1122, 4444, and 1321, which won't be included when repetitions are not allowed.