Step-by-step explanation:
Letters are from A-Z
Total = 26
Number are from 0-9
Total = 10
two letters followed by 5 numbers = 7 place values
So, in the first place we have a possibility of any of the 26 alphabet
1st place = 26
In the second place, we also have a possibility of any of the 26 alphabet
But because there is no repetition, the numbers will reduce by 1
So, the 2nd place = 25 possibilities of alphabet
2nd place = 25
In the third place, we have a possibility of any of the any of the numericals 0-9 (total is 10)
The 3rd palce = 10
The 4th place has a possibility of any of the any of the numericals 0-9
But because there is no repetition, the numbers will reduce by 1
4th place = 9
The 5th place has a possibility of any of the any of the numericals 0-9
But because there is no repetition, the numbers will reduce by 1
5th place = 8
The sixth place has a possibility of any of the any of the numericals 0-9
But because there is no repetition, the numbers will reduce by 1
The 6th place = 7