Multiple choice general knowledge math & puzzles

A = {1,2,3,4}, B = {2,4,6,8}, C = {3,4,5,6} Find: (A n B) U C

  1. {1,3,4,6,8}

  2. {2,4,5,6,8}

  3. {2,3,4,5,6}

  4. {1,4,5,6,8}
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C Correct answer
Explanation

First find A n B = {2,4} (common elements only), then union with C = {3,4,5,6}. Combining all unique elements: {2,4} U {3,4,5,6} = {2,3,4,5,6}. Note: 4 appears in both but is listed once in the result.

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