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How many 7-letter passwords can you make from the letters A, B, C, D, E, F and G, if letters CANNOT be repeated?
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How many 7-letter passwords can you make from the letters A, B, C, D, E, F and G, if letters CANNOT be repeated?

User AntiGMO
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5040 passwords, if 7 is n, n(n-1)(n-2)(n-3)(n-4)(n-5)(n-6). Answer is 5040
User Dan Dascalescu
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