Permutations and Combinations
The number of different words that can be made with the letters of the word so that there are exactly two letters between the two vowels is ____ .
Correct Answer: Option(a)
has vowels and
Given condition: There are exactly letters between two vowels
So lets arrange the vowels first.
There are blacks and letters remaining.
So, we vcan arrange the letters in blacks by selecting blacks and arrange blacks.
Case Similar to Case
no. of ways
Total arrang words satisfying given condition