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JAMB Mathematics 2014 Question 48

Question 48

Permutation and Combination

In how many ways can a team of 3 girls be selected from 7 girls?

  1. A.7!/(2!5!)
  2. B.7!/3!
  3. C.7!/4!
  4. D.7!/(3!4!)
Show the answer and explanation

Answer: D (7!/(3!4!))

Explanation

Order does not matter, so use combinations: 7C3 = 7!/(3!4!).