Union of Sets

The union of set A and set B,  $A\cup B$ , is the set consists of 

The Venn diagram for  $A\cup B$  is represented in green as

The elements in P∪Q are

Base on the Venn diagram given, the  $n\left(P\cup Q\right)$  is 

Base on the Venn diagram given,  $P\subset Q$  . Hence,  $P\cup Q$  can be represents by

Base on the Venn diagram, which of the following represents  $B\cup C$  

Base on the Venn diagram,  $n\left(X\cup Y\right)=$  

Base on the Venn diagram, which of the region below shows  $A\cup B\cup C$  ?

Base on the Venn diagram, which of the following is false?

Given that   $\xi=\left\{x:x\ is\ an\ integer\ between\ 10\ and\ 20\right\}$ , 
P = {even number}
Q = {prime number} and
R = {perfect square}.

Find  $n\left(P\cup Q\cup R\right)$  .