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.
A first letter = 15 ways
E first letter = 11 ways
I first letter = 7 ways
O first letter = 1 way
So 34 total ways
+817 
