At the beginning of school you set-up a 4 digit pin to get into your My Payments Plus account, however you have not used your account since you set it up and forgot the
number. You remember that the first number was a 4 and the second number was
either a 5, 6, or 7. You had no idea what the last two numbers were.

How many
different combinations are possible?

900 combinations
200 combinations
300 combinations
1200 combinations