WAEC Mathematics 1998 Question 1

Question 1

Sets

If S⊂R, then

  1. A.S∩R = R
  2. B.S∩R = S
  3. C.S∪R = S
  4. D.S∩R = S'
  5. E.S∩R = R'
Show the answer and explanation

Answer: B (S∩R = S)

Explanation

If S is a subset of R, every element of S is already in R, so the common part of S and R is S itself.