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How many ways can you write two different letters chosen from
A B C D E F G H I J K L M N O P
so that they are in alphabetical order, and the first letter is a vowel?  For example, AF and EN count, but DE and KC do not.

 Mar 22, 2024
 #1
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https://web2.0calc.com/questions/counting_37747

 

 

cool cool cool

 Mar 22, 2024

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