Question

If A = {1, 3, 5, 7, 9} and B = {2, 4, 6, 8}, then the set builder representation of A U B is

• A. {x: x is a natural number}
• B. {x: x is a natural number which is less than 10}
• C. {x: x is an odd number}
• D. {x: x is an odd number less than 10}

Answer 1

The correct option is B

{x: x is a natural number which is less than 10}

Given, A = {1, 3, 5, 7, 9} and B= {2, 4, 6, 8} then A U B = {1, 2, 3, 4, 5, 6, 7, 8, 9}

Therefore, set builder representation of A U B is {x: x is a natural number which is less than 10}