If $A=\{3,6,9,12,15,18,21\}, B=\{4,8,12,16,20\},$ $C=\{2,4,6,8,10,12,14,16\}, D=\{5,10,15,20\} ;$ find
$C-B$
$\{ 2,6,10,14\} $
$C-B=\{2,6,10,14\}$
If $A, B$ and $C$ are three sets such that $A \cap B = A \cap C$ and $A \cup B = A \cup C$ then
If $A \cap B = B$, then
Let $A$ and $B$ be two sets in the universal set. Then $A – B$ equals
The shaded region in the given figure is
If $X$ and $Y$ are two sets such that $n( X )=17, n( Y )=23$ and $n( X \cup Y )=38$ find $n( X \cap Y )$
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