WAEC Further Mathematics 2016 Question 13

Question 13

Permutations and Combinations

Simplify: nP5/nC5

  1. A.80
  2. B.90
  3. C.110
  4. D.120
Show the answer and explanation

Answer: D (120)

Explanation

ⁿP₅ = 5! × ⁿC₅, so the ratio is 5! = 120.