heavenholst7352 heavenholst7352

04-08-2017
Mathematics

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An identification code is to consist of 2 letters followed by 3 digits. how many different codes are possible if repetition is permitted question mark

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sergibcnusa sergibcnusa

04-08-2017

I like the 'question mark' at the end:

26 letters (English), 10 digits (0,1,...9)

26*26*10*10*10 = 676000

Now, this was for LLDDD (Letter Letter Digit Digit Digit)

It seems this is the order they want. Other wise, one should multiply by all the combinations in the order: LDLDD, DLLDD, etc ... (10 combinations), but again it seems they want this LLDDD

So 676000

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