the middle position. Constanants are used in the 1st and 3rd positions. How many codes can be created? Thanks, I didn't post entire question before.
An airport tags baggage with 3 letter codes. There are 21 constanants and 5 vowels. Vowels are used only in?
but how come the code for O'Hare in Chicago is ORD and LaGuardia in NYC is LGA
Reply:By your rules it is 21 * 5 * 21 = 2205
As the first answer states, those rules are not really true for airport codes.
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