Sets

Question 1

A : { 2, 3, 4, 5, }
B : { 2, 4, 6, 8, }

what is A U B : ?
(Union)

Answer 1

A U B : { 2, 3, 4, 5, 6, 8 }

Question 2

A : { 2, 3, 4, 5 }

B : { 2, 4, 6, 8 }

What is A N B : ?
(Intersection)

Answer 2

The answer to this is what both of the sets have in common

A N B : { 2 , 4 }

Question 3

If you are doing a problem and it is asking about precents of the same number, you can just do them out of 100