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WAEC 2025 · Paper 1 · Q8✱✱

If R={2,4,6,7}R = \{2, 4, 6, 7\} and S={1,2,4,8}S = \{1, 2, 4, 8\}, find R∪SR \cup S.

Worked solution (try it first)
  1. The union holds every element that is in RR or SS or both, each listed once.
  2. So R∪S={1,2,4,6,7,8}R \cup S = \{1, 2, 4, 6, 7, 8\}, option A.

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