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tim93

  • 3 years ago

A code word is either a sequence of three letters followed by two digits or two letters followed by three digits. (Unless otherwise indicated, letters will means letters cho- sen from the usual 26-letter alphabet and digits are selected from f0; 1; 2; 3; : : : ; 8; 9g. Also, unless it is stated that letters have to be dierent, you should assume repeats are allowed. Likewise for digits.) How many dierent code words are possible?

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  1. tim93
    • 3 years ago
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    Is it (26*26*10*10*10) + (26*26*26*10*10)

  2. Wired
    • 3 years ago
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    Yep, looks right.

  3. ash2326
    • 3 years ago
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    Yeah you're correct

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