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13 November, 08:01

Frank is choosing a 2 letter password from the letters A B C D and E. the password cannot have the same letter repeated in it. how many such passwords are possible

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Answers (2)
  1. 13 November, 08:17
    0
    You can have ten choices
  2. 13 November, 11:05
    0
    20 possible combinations
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