Question

What is the union of the two sets R = {10, 11, 13, 15, 17} and T = {5, 7}

A. {5, 7}

B. {5, 7, 10, 11, 13, 15 ,17}

C. {15, 17}

D. null set

Answer 1

Union when you join

Answer 2

and intersection is when you take only the items which appear in both sets

intersection of {1,3,5} and {1,6} is {1}
union of {1,3,5} and {1,6} is {1,3,5,6}