6.)consider this: U={3,6,9,12,15} A={3,6}, B={6,9,12}, C={3,12,15}, set U is an example of

A. Universal set
B. Subset
C. Null set
D. infinite set

7.) A set containing no elements and is denoted by the symbols { } or ø

A. Universal set
B. Subset
C. Null set
D. infinite set

8.) Consider set A and B:

A= {12,15,23,34,45,68} , B= {23,34,43,58}

Find A n B
A. A n B = {12,34}
B. A n B = { 23,34 }
C. A n B = { 12,23,34 }
D. A n B = { 12,34,58,68 }

9.) it is a measure of the "number of elements" of the set

A. Cardinality Of a set
B. Universal set
C. Verbal description method
D. Venn diagram

10.) The set containing All objects or elements and of which all other sets are subsets

A. Universal set
B. Subset
C. Null set
D. Infinite set​