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16 September, 19:14

Justin is choosing a 2-letter password from the letters A, B, and C. The password cannot have the same letter repeated in it. How many such passwords are possible?

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  1. 16 September, 20:17
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    3 - AB, AC, and BC. the first letter should be complied with the other letters proceeding it, and just repeat the order with other letters.
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