If $A$ and $B$ are two sets such that $A \subset B$, then what is $A \cup B ?$
If $A$ and $B$ are two sets such that $A \subset B,$ then $A \cup B=B$
If $A, B, C$ are three sets, then $A \cap (B \cup C)$ is equal to
$A-(A-B)$ is
If $A=\{3,5,7,9,11\}, B=\{7,9,11,13\}, C=\{11,13,15\}$ and $D=\{15,17\} ;$ find
$A \cap B$
State whether each of the following statement is true or false. Justify you answer.
$\{2,6,10\}$ and $\{3,7,11\}$ are disjoint sets.
If $A = \{ x:x$ is a natural number $\} ,B = \{ x:x$ is an even natural number $\} $ $C = \{ x:x$ is an odd natural number $\} $ and $D = \{ x:x$ is a prime number $\} ,$ find
$A \cap C$
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