1
COMEDK 2026 Morning Shift
MCQ (Single Correct Answer)
+1
-0

If $A=\{x: x$ is the first three odd numbers $\}$

$B=\{2 x+3: 0 \leq x<5, x \in \mathbb{N}\}$, then which of the following is true

A

$A \subset B$

B

$n(B)=5$

C

$A \cap B=\emptyset$

D

$A \cap B$ is a singleton set

2
COMEDK 2026 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Samhita faces a three-headed dragon. She wins a "Tactical medal" if she manages to defeat exactly one of the three heads.

The battle proceeds head-by-head under the following conditions:

  • The probability of defeating the first head is $\frac{\mathbf{1}}{\mathbf{3}}$.

  • After a win: if she defeats a head, the probability of defeating the next head is $\frac{2}{3}$.

  • After a loss: if she fails to defeat a head, the probability of defeating the next head is $\frac{\mathbf{1}}{\mathbf{4}}$.

What is the probability that Samhita earns the "Tactical medal"?

A

$\frac{23}{72}$

B

$\frac{5}{36}$

C

$\frac{17}{72}$

D

$\frac{19}{72}$

3
COMEDK 2026 Morning Shift
MCQ (Single Correct Answer)
+1
-0

$$ \int e^{2 x} \cos (5 x+3) d x= $$

A

$$ \frac{e^{2 x}}{29}[2 \sin (5 x+3)+5 \cos (5 x+3)]+C $$

B

$$ \frac{e^{2 x}}{29}[2 \sin (5 x+3)+5 \cos (5 x+3)]+C $$

C

$$ \frac{e^{2 x}}{29}[2 \cos (5 x+3)+5 \sin (5 x+3)]+C $$

D

$$ \frac{e^{2 x}}{29}[5 \cos (5 x+3)-2 \sin (5 x+3)]+C $$

4
COMEDK 2026 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Given $A=\left(\begin{array}{ll}1 & 2 \\ 2 & 3\end{array}\right)$ and $f(x)=x^2-2 x-3$ then $f(A)$ is:

A

Identity matrix

B

Skew symmetric matrix

C

Null matrix

D

Symmetric Matrix