If letters may repeat, the number of four letter words from R, O, S an…

Question

If letters may repeat, the number of four letter words from R, O, S and E becomes:

Accepted Answer

C. 256

1. Each of the 4 places has 4 choices.
2. That is 4 multiplied by itself four times.
3. The count is 256.
_Source: syllabus Mathematics, Chapter 7, Permutations and Combinations._

Answer

64

Answer

128

Answer

24

If letters may repeat, the number of four letter words from R, O, S and E becomes:

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