Concept: The question tests on the area of Counting
When an n letter word contains a letters of 1 type, b letters of another type and so on, then the total number of words formed = n! / (a! * b!...)
B E N E V O L E N T has a total of 10 letters with E being repeated thrice and N twice.
Since L is fixed in the last place, the remaining 9 letters can be arranged in 9! / 3!2! = 30240 ways