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WAEC Mathematics 2009 Question 7

Question 7

Sets

Two sets are disjoint if

  1. A.they are both empty
  2. B.their union is an empty set
  3. C.their intersection is an empty set
  4. D.one of them is a subset of the other.
Show the answer and explanation

Answer: C (their intersection is an empty set)

Explanation

Disjoint sets have no element in common, so their intersection is empty.