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JAMB Mathematics 2007 Question 9

Question 9

Permutation and Combination

In how many ways can 6 subjects be selected from 10 subjects for an examination?

  1. A.218
  2. B.216
  3. C.215
  4. D.210
Show the answer and explanation

Answer: D (210)

Explanation

10C6 = 10C4 = (10 × 9 × 8 × 7)/(4 × 3 × 2 × 1) = 210.