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How many different user ID's can be formed from the letters W, X, Y, Z if no repetition of letters is allowed?
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How many different user ID's can be formed from the letters W, X, Y, Z if no repetition of letters is allowed?

User Shackrock
by
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1 Answer

3 votes

Answer:

16

Explanation:

4 x 4

User Pmorken
by
5.2k points
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