Brute force.
4
20
24
120 ABCDE , there are 120 ways these five letters can be rearranged.
12
The number of combinations of 6 letters is 6! or 720.
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.
There are about 57 words that are combinations of the letters A through G There are about 57 words that are combinations of the letters A through G
As there are 26 letters in the alphabet. You can calculate the number of combinations by multiplying 26x26x26, giving you the answer 17576.
4
3,124,550 possible combinations
7,893,600 (seven million, 8 hundred ninety-three thousand, 600) combinations in English.
24
20
120 ABCDE , there are 120 ways these five letters can be rearranged.
12
From 4 letters, you can create three-letter combinations by selecting any 3 letters from the 4 and arranging them. The number of ways to choose 3 letters from 4 is given by the combination formula ( \binom{4}{3} = 4 ). Each of these combinations can be arranged in ( 3! = 6 ) ways. Therefore, the total number of three-letter combinations is ( 4 \times 6 = 24 ).