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How many license plates consist of 2 letters followed by 2 digits, if one of the digits must be odd?

 
 Oct 9, 2021
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0-99 is 100 numbers

odd      odd       25

even    odd       25

odd      even     25

even    even     25       so 75 have at least one odd digit

 

26 letters x 26 lettes x 75 numbers = 50700 plates

 
 Oct 9, 2021

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