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How do I work this problem? A license plate is to consist of 2 letters followed by 5 digits. Determine the number of different license plates possible if repetition of letters and numbers is not permitted. is this correct 26*26*10*10*10*10*10= 67,600,000

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  1. correct, assuming that repetition of letters and numbers is allowed

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  2. 26*25*10*9*8*7*6=19656000

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