A zip code is a string of five digits (0,1,2,3,4,5,6,7,8,9). How many zip codes are there...

A zip code is a string of five digits (0,1,2,3,4,5,6,7,8,9). How many zip codes are there subject to the following restrictions?
(1) Only even digits are allowed.
(2) The first digital is even and the last digit is odd
(3) Digits cannot be repeated
(4) 0 appears exactly four times
(5) 0 appears at at least once

Solve the following discrete mathematics problem above. Show all work/explanations

Expert Solution

Colby Messinger answered 2 years ago

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