Union and intersection of set

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

What is AUB?

• {1,2,3,4,5}

• {3,4}

• {1,2}

• {4,5}

What is represented in the figure ?

• union

• intersection

• complement

• difference

The figure is a representation of ___

A={1,3,4} B={3,7}

What is A intersection B?

• 7

• 4

• 3

• 1

A={b,o,y} C={t,o,y}

The union of set A and set C is __