27^27
4
There are 120 permutations and 5 combinations.
7*3*4 = 84 combinations.
10,000.
4
256 iThink * * * * * 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.
12
how many combinations of 4 numbers are there in 7 numbers
20
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.
10 * * * * * That is just plain wrong! It depends on how many numbers in each combination but there are 1 combination of 4 numbers out of 4, 4 combinations of 3 numbers out of 4, 6 combinations of 2 numbers out of 4, 4 combinations of 1 number out of 4. A grand total of 15 (= 24-1) combinations.
You would get 4!/2! = 12 combinations.
There are 4845 combinations.
3,124,550 possible combinations
im assuming that any charcter can be a number or a letter: (24letters*10 possible numbers)^(4 digits)= 3317760000 possible combinations.
27^27