ECAT Engineering Exams Quizzes MCQs Quizzes ECAT Engineering Entry Test 2017 Mathematics Permutations, Combinations and Probability

Question:
If n is any position integer, then

Option A):
n! = n (n + 1)!
Option B):
n! = n (n - 2)!
Option C):
(n+1)! = (n+1)n!
Option D):
(n+1)!=(n+1)(n-1)!

Correct Answer is Option C):
(n+1)! = (n+1)n!