37
MCQ (Single Correct Answer)
If $X=\left\{8^n-7 n-1 \mid n \in N\right\}$ and $y=\{49 n-49 \mid n \in N\}$. Then,
A
$X \subset Y$
B
$Y \subset X$
C
$X=Y$
D
$X \cap Y=\phi$
38
MCQ (Single Correct Answer)
A survey shows that $63 \%$ of the people watch a news channel whereas $76 \%$ watch another channel. If $x \%$ of the people watch both channel, then
A
$x=35$
B
$x=63$
C
$39 \leq x \leq 63$
D
$x=39$
39
MCQ (Single Correct Answer)
If sets $A$ and $B$ are defined as $A=\left\{(x, y) \left\lvert\, y=\frac{1}{x}\right., 0 \neq x \in R\right\}, B=\{(x, y) \mid y=-x, x \in R$,$\} . Then,$
A
$A \cap B=A$
B
$A \cap B=B$
C
$A \cap B=\phi$
D
$A \cup B=A$
40
MCQ (Single Correct Answer)
If $A$ and $B$ are two sets, then $A \cap(A \cup B)$ equals to
A
$A$
B
$B$
C
$\phi$
D
$A \cap B$
41
MCQ (Single Correct Answer)
If $A=\{1,3,5,7,9,11,13,15,17\}, B=\{2,4, \ldots, 18\}$ and $N$ the set of natural numbers is the universal set, then $\left(A^{\prime} \cup(A \cup B) \cap B^{\prime}\right)$ is
A
$\phi$
B
N
C
A
D
B