1. In Alberta, all postal codes start with the letter T. How many different postal codes are possible in Alberta? In Canada, all postal codes are made up of six characters, which follow the pattern letter-digit- letter-digit-letter-digit. The first letter of the code identifies a specific region. Each of the remaining two letters in the postal code can be any of 20 letters, and each of the three digits can be any digit from 0 to 9. All letters and digits can be repeated. Answer: (3) 2. Karen's grandfather has a bank card that requires a four-digit Personal Identification Number (PIN). All digits from 0 to 9 can be used. a. How many PINs are possible if the digits can repeat? Answer: (3) b. How many PINs are possible if the digits cannot repeat? Answer: (4) 3. How many three-letter arrangements can be made from the letters in VERTICAL if no letter can be used more than once and each arrangement is made up of a vowel between two consonants? Answer: (4)