Answer:
676,000 different plates
Explanation:
First alphabet = A - Z = 26 alphabets
Second alphabet = A - Z = 26 alphabets
Possible pairs = 26 * 26 = 676
3 digits:
Digits = (0 - 9) = 10
1st = 10
2nd = 10
3rd = 10
Possibilities = 10^3 = 1000
Total different possible number plates :
1000 * 676 = 676,000