February 26, 2017

Homework Help: Math

Posted by B.B on Friday, August 14, 2009 at 7:26pm.

How many 4-character license plates are possible with 2 letters from the alphabet followed by 2 digits, if repetitions are allowed? And no repetitions are allowed?
Answer: If repetitions are allowed: 26*26*10*10=67,600
No repetitions are allowed: 26*25*10*9=58,500
Is this correct?

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