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WAEC Mathematics 2020 Question 2

Question 2

Sets

If X = {x : x < 7} and Y = {y : y is a factor of 24} are subsets of μ = {1, 2, 3, … 10}, find X ∩ Y.

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

Answer: B ({1, 2, 3, 4, 6})

Explanation

X = {1, 2, 3, 4, 5, 6} and Y = {1, 2, 3, 4, 6, 8}. The common elements are {1, 2, 3, 4, 6}.