Hi, i have a test tommorow and I can't seem to figure out these two problems:(adsbygoogle = window.adsbygoogle || []).push({});

1. Atm codes: to use an automated teller machine, you generaaly must enter a four-digit code, using 0-9. How many four digits codes are possible if repetition of digits is permitted?

2. Licence plate: a license plate is to have uppercase letters or digits. Determine the number of license plates possible if repetition is permitted and if any position can contain either a letter or digit with the expection that the first position caanot the letter o or the number 0.

Can some one help me?

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# Homework Help: Help me

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