Question

How many different 4-digit numbers can be formed using only digits 1, 2, 3, and 4, given that they contain each of these digits as many times as you want?

Answer 1

its 256 i will give u the answer but not the work because i did it on paper

Explanation:

Answer 2

Since the numbers are replaced, and we have 4 total digits to pick from, our answer is
`4^4=256`, because of the mutliplication rule.