Question

Find A ∩ B if A = {4, 7, 10, 13, 17} and B = {3, 5, 7, 9}.

A. {3, 4, 5, 7, 9, 10, 13, 17}
B. Ø
C. {7}

Answer 1

The answer is C. because 7 is in set A and set B.

Answer 2

{7}

Explanation:

A = {4, 7, 10, 13, 17} and B = {3, 5, 7, 9}.

A ∩ B This means intersection. What is in both of the sets for A and B

{7}