Question

Draw a venn diagram of $A\cup B$

Answer 1

$A\cap B\Rightarrow$ A and B
(A intersection B)
$A\cup B\equiv$ Region (1) + Region (2) + Region (3)
= Set of elements which are in A or in B or in both.
(Shown by yellow color)
$A\cup B=A+B-A\cap B$