WAEC Further Mathematics 2009 Question 19

Question 19

Permutations and Combinations

If 8Px/8Cx = 6, find the value of x

  1. A.1
  2. B.2
  3. C.3
  4. D.6
Show the answer and explanation

Answer: C (3)

Explanation

nPr = r! × nCr, so the ratio is x! = 6 and x = 3.