Question
Mathematics Question on permutations and combinations
Find all the four letter words with two vowels and 2 consonants from the word UNIVERSE?
Answer
The correct answer is 432
Vowels - I, U, E,
Consonants - N, V, R, S
⇒ 3C2 × 4C2 × 4!
= 3 × 6 × 24
= 432
So, 432 four letters word can be made