WAEC Mathematics 2004 Question 26

Question 26

Sets

Given that ξ = {1,2,3,......,10}, P = {x: x is prime} and Q = {y : y is odd}, find P'∩Q

  1. A.{2}
  2. B.{1,9}
  3. C.{3,5,7}
  4. D.{1, 6, 8, 10}
Show the answer and explanation

Answer: B ({1,9})

Explanation

P' = {1, 4, 6, 8, 9, 10} and Q = {1, 3, 5, 7, 9}; their common elements are 1 and 9.