Question

Let A = {1, 2, 3, 4, 5, 6} and B = {2, 4, 6, 8}. Find A - B and B - A.

• A. {1, 3, 5}; {8}
• B. {1, 5}; {8}
• C. {1, 3, 5}; {2, 4, 6}
• D. {2, 4, 6}; {2, 4, 6}

Answer 1

The correct option is A

{1, 3, 5}; {8}

A = {1, 2, 3, 4, 5, 6}

B = {2, 4, 6, 8}

A - B = {1, 2, 3, 4, 5, 6} - {2, 4, 6, 8}

= {1, 3, 5}

B - A = {2, 4, 6, 8} - {1, 2, 3, 4, 5, 6}

= {8}