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WAEC Further Mathematics 2026 Question 38

Question 38

Permutations and Combinations

Simplify: 8! + 6!

  1. A.6! × 56
  2. B.6! × 57
  3. C.8! × 30
  4. D.8! × 31
Show the answer and explanation

Answer: B (6! × 57)

Explanation

8! = 8 × 7 × 6! = 56 × 6!, so 8! + 6! = 6!(56 + 1) = 6! × 57.