Use the following information to answer this question. In Canada, all postal codes have characters in the pattern letter-digit-letter-digit-letter-digit. The first letter of the postal code identifies a specific region. Each of the postal code letters can be any of the 20 letters, and each of the remaining three digits can be any digit from 0 to 9. All letters and digits can be repeated.
In Alberta, all postal codes start with the letter T. How many postal codes are possible in Alberta? Select one:
a) 361,000
b) 6,273,000
c) 29,000
d) 400,000