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If R = {2, 4, 6, 7} and S = {1, 2, 4, 8} then...

Mathematics
WAEC 2025

If R = {2, 4, 6, 7} and S = {1, 2, 4, 8} then R ∪ S equals 

  • A. {1, 2, 4, 6, 7, 8}
  • B. {1, 2, 4, 7, 8}
  • C. {1, 4, 7, 8}
  • D. {2, 6, 7}
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Correct Answer: Option A
Explanation

R = {2, 4, 6, 7}, S = {1, 2, 4, 8}

R ∪ S ⇒ element in R and S together without replacement.

∴ R ∪ S = {1, 2, 4, 6, 7, 8}

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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