# Thread: Organized Counting Problem Help

1. ## Organized Counting Problem Help

Problem:
A Canadian postal code uses six characters. The first, third, and fifth are letters, while the second, forth, and sixth are digits. A U.S.A. zip code contains five characters, all digits.

How many codes are possible for each country?

I'm stuck on this problem...actually I don't understand the 'Permutations and Organized Counting' unit at all... Anyway, can someone please help me with this question?

2. Originally Posted by Morphayne
Problem:
A Canadian postal code uses six characters. The first, third, and fifth are letters, while the second, forth, and sixth are digits. A U.S.A. zip code contains five characters, all digits.

How many codes are possible for each country?

I'm stuck on this problem...actually I don't understand the 'Permutations and Organized Counting' unit at all... Anyway, can someone please help me with this question?
In general, when dealing with this unit, ask your self 2 questions. Does order matter, and do you pick with replacement or not (i.e. do the possibilities change as you pick from the "pile")?

Order matters and you do pick with replacement.