1.  How many words can be formed by re-arranging the letters of the word ASCENT such that A and T occupy the first and last position respectively?
A. 5!
B. 4!
C. 6! - 2!
D. 6! / 2!

Answer: Option B

Explanation:

As A and T should occupy the first and last position, the first and last position can be filled in only one way. The remaining 4 positions can be filled in 4! Ways by the remaining words (S,C,E,N,T).

Hence by rearranging the letters of the word ASCENT we can form 1x4! = 4! words.