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17 October, 02:04

To create an entry code, you must first choose 2 letters and then, 4 single-digit numbers. How many different entry codes can you create?

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  1. 17 October, 04:42
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    Assuming that the letters can only be capitals or non-capitals then:

    (26P2) * (9P1) * 4 = 23400 possible combanations
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