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.

ABJeIIy Apr 14, 2024

#1**0 **

*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.

Bosco Apr 14, 2024