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

$$ \mathop {\lim }\limits_{x \to 0} \frac{(1-\cos 2 x)(3+\cos x)}{x \tan 4 x} \text { is equal to: } $$

A

3

B

2

C

4

D

1

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

A square plate is contracting at a uniform rate of $2 \mathrm{~cm}^2 / \mathrm{min}$. The rate at which the perimeter is decreasing when the side of the square is 16 cm is:

A

$\frac{1}{8} \mathrm{~cm} / \mathrm{min}$

B

$\frac{1}{4} \mathrm{~cm} / \mathrm{min}$

C

$16 \mathrm{~cm} / \mathrm{min}$

D

$32 \mathrm{~cm} / \mathrm{min}$

3
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

4
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

$\frac{19}{72}$