Sets, Relations and Functions - Arithmetic Aptitude Questions and Answers

Home / Arithmetic Aptitude / Sets, Relations and Functions :: Discussion

If X = {1, 2, 3, 4, 5, 6, 7, 8, 9} A = {x ? N: 30 < x2 < 70}, B = {x : x is a prime number less than 10}, then which of the following is false:

A-B = {6, 8}

A? B = {7, 8}

A ? B = {2, 3, 5, 6, 8}

A U B = {2, 3, 5, 6, 7, 8}

Answer : Option B

Explanation :

A? B = {7, 8}

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