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How many different two-letter passwords can be formed from the letters A, B, C, D, and E if no repetition of letters is allowed?
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How many different two-letter passwords can be formed from the letters A, B, C, D, and E if no repetition of letters is allowed?

User Rajendra Arora
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25 AA AB AC AD AE 5x5 is 25
User Seymar
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