# Thread: counting methods- urgent question

1. ## counting methods- urgent question

There are 5 vowels and 21 consonants in the English alphabet. How many different four-letter "words" can be formed that contain 2 different vowels and 2 different consonants?
explanations would be greatly appreciated thnxu!!!!!

2. $\left( 4! \right) {5 \choose 2}{21 \choose 2}$??