An identification code is composed of three characters. the first character is the letters a or b, followed by a 2, 4, or 6, and ending with either the letters y or z. how many possible codes exist?
An identification code is composed of three characters. the first character is the letters a or b, followed by a 2, 4, or 6, and ending with either the letters y or z. how many possible codes exist?
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