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How many 5-digit numbers are there, where the leftmost digit and the rightmost digit are both even?

 Jun 18, 2022
 #1
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You should have:

 

4 choices for the first digit x 10 choices for the 2nd x 10 choices for the 3rd x 10 choices for the 4th x 5 choices for the last digit ==20,000 such numbers.

 Jun 18, 2022

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