Answer:
20,077,200
Explanation:
We can resolve this problem multiplying:
We have 26 different letters in the alphabet, in the example says two letters and three letters, in addition, is followed by two or three digits, and there are 10 digits, the formula would be:
Using 2 letters and 2 digits is 26^2 X 10^2 = 67,600
Using 2 letters and 3 digits is 26^2 X 10^3 = 676,000
Using 3 letters and 2 digits is 26^3 X 10^2 = 1,757,600
Using 3 letters and 2 digits is 26^3 X 10^3 = 17,576,000
and the sum is 20,077,200
