Permutation and Combination

Factorials - Find the value of n if [2n! / 3! (2n - 3)!] : [n! / 2!(n - 2)!] = 44 : 3

Find the value of n if [2n! / 3! (2n - 3)!] : [n! / 2!(n - 2)!] = 44 : A solved example on Factorials in Permutation and Combinations

Factorials - Prove that n!(n + 2) = n! + (n + 1)!

Prove that n!(n + 2)! = n! + (n + 1)! A solved example on Factorials from Permutations and Combinations

Factorials - If (n + 2)! = 2550 (n!), find n?

Question: If (n + 2)! = 2550 (n!), find n? A solved example on Factorials in Permutations and Combinations.

Factorials - Find x if x/10! = 1/8! + 1/9!

Find x if x/10! = 1/8! + 1/9! A solved example of Factorials in Permutations and Combinations