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256 iThink
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It depends on combinations of how many. There is
1 combination of 4 letters out of 4,
4 combinations of 3 letters out of 4,
6 combinations of 2 letters out of 4,
4 combinations of 1 letter out of 4.
Than makes 15 (= 24-1) in all. Well below the 256 suggested by the previous answer.
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How many 9 letter combinations using 26 alphabet letters?
3,124,550 possible combinations
How many possible unique alpha numeric combinations are there using all letters for 4 characters?
im assuming that any charcter can be a number or a letter: (24letters*10 possible numbers)^(4 digits)= 3317760000 possible combinations.
How many possible combinations of three letters are there?
Say you have the letters A,B, and C. Here are all the possible combinations. * ABC * ACB * BAC * BCA * CAB * CBA So, 6 if you don't repeat any of the letters. If you DO repeat letters, then simply take the number of letters you have, (3 for instance), and multiply it to the power of the number of letters you have. So, for 3 letters, the formula would be 33 . Or if you had 4 letters it would be 44 and so on.
How many combinations r there in 4 colors?
There are 1 combination of 4 colours out of 4, 4 combinations of 3 colours out of 4, 6 combinations of 2 colours out of 4, 4 combinations of 1 colour out of 4. A grand total of 15 (= 24-1) combinations.
How many combinations can you make out of 3 letters and 3 numbers?
You could make 10*10*10*26*26*26 combinations, or 17576000 combinations.
