1
TG EAPCET 2024 (Online) 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

If a random variable $X$ has the following probability distribution, then its variance is

X = x 1 3 5 2
P(X = x) $3 K^2$ K $K^2$ 2K
A
$\frac{9}{4}$
B
$\frac{25}{8}$
C
$\frac{27}{16}$
D
$\frac{15}{16}$
2
TG EAPCET 2024 (Online) 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
The mean and variance of a binomial variate $X$ are $\frac{16}{5}$ and $\frac{48}{25}$ respectively. IfP $(X > 1)=1-K\left(\frac{3}{5}\right)^{7}$, then $5 K=$
A
19
B
3
C
2
D
11
3
TG EAPCET 2024 (Online) 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
$P$ and $Q$ are the points of trisection of the line segment joining the points $(3,-7)$ and $(-5,3)$. If $P Q$ subtends right angle at a variable point $R$, then the locus of $R$ is
A
a circle with radius $\frac{\sqrt{41}}{3}$
B
a circle with radius $\sqrt{409}$
C
a pair of straight lines passing through $(-1,-2)$
D
a pair of straight lines passing through $(1,2)$
4
TG EAPCET 2024 (Online) 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
$(a, b)$ is the point to which the origin has to be shifted by translation of axes so as to remove the first-degree terms from the equation $2 x^{2}-3 x y+4 y^{2}+5 y-6=0$. If the angle by which the axes are to be rotated in positive direction about the origin to remove the $x y$-term from the equation $a x^{2}+23 a b x y+b y^{2}=0$ is $\theta$, then $\tan 2 \theta=$
A
$\frac{\pi}{4}$
B
60
C
$\frac{\pi}{3}$
D
15
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