Examples Permutation & Comb...

Question: Simplify [4 (45!) + 46!] / [150 (44!)] Question: Prove [15! / (5! x 10!)] + [15! / (4! x 11!)] = 16! / (5! x 11!) Question: Find 'n' if (16 - n)! / (14 - n)! = 12 Question: Find the LCM of 6!, 7! and 8! Question: Prove 1/9! + 1/10! + 1/11! = 122/11! Question: Simplify (10! - 9!) / 8! Question: If 1/4! + 1/5! = x/6!, find x? Question: Find x if x/10! = 1/8! + 1/9! Question: If (n + 2)! = 2550 (n!), find n? Question: Prove that n!(n + 2) = n! + (n + 1)! Question: Find the value of n if [2n! / 3! (2n - 3)!] : [n! / 2!(n - 2)!] = 44 : 3

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