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There are 26 letters in the alphabet.

If letters may be repeated in the airport code, then there are (26 x 26 x 26) = 17,576 possibilities.

If adjacent letters can't be duplicates, then there are (26 x 25 x 25) = 16,250 possibilities.

If all three letters must be different, then there are (26 x 25 x 24) = 15,600 possibilities.

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2010-02-19 16:12:57
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A polynomial of degree zero is a constant term

The grouping method of factoring can still be used when only some of the terms share a common factor A True B False

The sum or difference of p and q is the of the x-term in the trinomial

A number a power of a variable or a product of the two is a monomial while a polynomial is the of monomials

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Q: How many different 3 letter combinations are there... for example airports are typically LHR LGW LAX etc how many different possible combinations are there?
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