If $A, B$ and $C$ are any three sets, then $A - (B \cap C)$ is equal to
$(A - B) \cup (A - C)$
$(A - B) \cap (A - C)$
$(A - B) \cup C$
$(A - B) \cap C$
If $A \cap B = B$, then
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
$A-C$
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
$A-B$
If $A$ and $B$ are disjoint, then $n(A \cup B)$ is equal to
Which of the following pairs of sets are disjoint
$\{ x:x$ is an even integer $\} $ and $\{ x:x$ is an odd integer $\} $