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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.

 Apr 14, 2024
 #1
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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?
  

 

    34 ways  

 

If A is the first letter, then 15 possibilities    

If E is the first letter, then 11 possibilities    

If  I  is the first letter, then   7 possibilities    

If O is the first letter, then   1 possibility     

 

Add them up.  

 Apr 14, 2024

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