Final answer:
The probability of choosing abcd in order and any order from the first letters of the alphabet can be determined using simple calculations involving permutations.
Step-by-step explanation:
The probability of choosing abcd in order can be calculated by considering that there are 26 letters in the alphabet and we are choosing 4 without repeats. The first letter can be any of the 26, the second can be any of the remaining 25, the third can be any of the remaining 24, and the fourth can be any of the remaining 23. So the probability of choosing abcd in order is (1/26) * (1/25) * (1/24) * (1/23).
The probability of choosing abcd in any order can be calculated by considering that there are 4! (4 factorial) ways to arrange the letters abcd. The total number of ways to choose 4 letters without repeats from the first 26 letters of the alphabet is 26P4 (26 permutations 4). So the probability of choosing abcd in any order is 4! / 26P4.