$$ \mathop {\lim }\limits_{x \to 0} \frac{(1-\cos 2 x)(3+\cos x)}{x \tan 4 x} \text { is equal to: } $$
3
2
4
1
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:
$\frac{1}{8} \mathrm{~cm} / \mathrm{min}$
$\frac{1}{4} \mathrm{~cm} / \mathrm{min}$
$16 \mathrm{~cm} / \mathrm{min}$
$32 \mathrm{~cm} / \mathrm{min}$
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
$A \subset B$
$n(B)=5$
$A \cap B=\emptyset$
$A \cap B$ is a singleton set
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"?
$\frac{23}{72}$
$\frac{5}{36}$
$\frac{17}{72}$
$\frac{19}{72}$
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