Probability

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

How many codes are possible for each country?

american system
each position can be any one of 10 numbers.0 to 9
total 10^5 answer if 00000 is acceptable. If all zeros is not acceptable ,then 10^5-1

canadian system
1st 3rd and 5th can each be any of 26 letters . the other three positions any of 10
total [26^3][10^3]

Arthur

KrissMath said:

How many codes are possible for each country?

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The more interesting question is, "At how many different web sites did KrissMath post this exercise?"