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Mathematics
List of top Mathematics Questions asked in KCET
The maximum area of a rectangle inscribed in the circle
(
x
+
1
)
2
+
(
y
−
3
)
2
=
64
(x + 1)^2 + (y - 3)^2 = 64
(
x
+
1
)
2
+
(
y
−
3
)
2
=
64
is
KCET - 2018
KCET
Mathematics
Approximations
In a simultaneous throw of a pair of dice, the probability of getting a total more than 7 is
KCET - 2018
KCET
Mathematics
Conditional Probability
The negation of the statement "72 is divisible by 2 and 3" is
KCET - 2018
KCET
Mathematics
validating statements
A flashlight has 10 batteries out of which 4 are dead. If 3 batteries are selected without replacement and tested, then the probability that all 3 are dead is
KCET - 2018
KCET
Mathematics
Probability
A bag contains 17 tickets numbered from 1 to 17. A ticket is draw at random, then another ticket is drawn at random, then another ticket is drawn without replacing the first one . The probability that both the tickets may show even numbers is
KCET - 2018
KCET
Mathematics
Probability
If
(
1
−
i
1
+
i
)
96
=
a
+
i
b
\left( \frac{ 1 - i}{1 + i}\right)^{96} = a + ib
(
1
+
i
1
−
i
)
96
=
a
+
ib
then (a,b) is
KCET - 2018
KCET
Mathematics
Complex Numbers and Quadratic Equations
If
A
=
[
cos
α
sin
α
−
sin
α
cos
α
]
A = \begin{bmatrix}\cos\alpha&\sin\alpha\\ - \sin\alpha&\cos\alpha\end{bmatrix}
A
=
[
cos
α
−
sin
α
sin
α
cos
α
]
, then
A
A
′
=
AA' =
A
A
′
=
KCET - 2018
KCET
Mathematics
Matrices
Everybody in a room shakes hands with everybody else. The total number of handshakes is 45. The total number of persons in the room is
KCET - 2018
KCET
Mathematics
Permutations
If A and B are mutually exclusive events , given that
P
(
A
)
=
3
5
,
P
(
B
)
=
1
5
P(A) = \frac{3}{5} , P(B) = \frac{1}{5}
P
(
A
)
=
5
3
,
P
(
B
)
=
5
1
, then P(A or B) is
KCET - 2018
KCET
Mathematics
Multiplication Theorem on Probability
The distance between the foci of a hyperbola is 16 and its eccentricity is
2
\sqrt{2}
2
. Its equation is
KCET - 2018
KCET
Mathematics
Hyperbola
The angle between the lines
2
x
=
3
y
=
−
z
2x = 3y = - z
2
x
=
3
y
=
−
z
and
6
x
=
−
y
=
−
4
z
6x = - y = - 4z
6
x
=
−
y
=
−
4
z
is
KCET - 2018
KCET
Mathematics
angle between two lines
The feasible region of an LPP is shown in the figure . If
z
=
3
x
+
9
y
,
z = 3x + 9y ,
z
=
3
x
+
9
y
,
then the minimum value of z occurs at
KCET - 2018
KCET
Mathematics
Linear Programming Problem
A die is thrown four times. The probability of getting perfect square in at least one throw is
KCET - 2018
KCET
Mathematics
Conditional Probability
For the probability distribution given by
X
=
x
i
X=x_{i}
X
=
x
i
0 1 2
p
i
p_{i}
p
i
25
36
\frac{25}{36}
36
25
5
18
\frac{5}{18}
18
5
1
36
\frac{1}{36}
36
1
the standard deviation
(
σ
)
(\sigma)
(
σ
)
is
KCET - 2018
KCET
Mathematics
Probability
If
sin
−
1
x
+
cos
−
1
y
=
2
π
5
\sin^{-1} \,x + \cos^{-1} \,y = \frac{2 \pi}{5}
sin
−
1
x
+
cos
−
1
y
=
5
2
π
, then
cos
−
1
x
+
sin
−
1
y
\cos^{-1} \,x + \sin^{-1}\, y
cos
−
1
x
+
sin
−
1
y
is
KCET - 2018
KCET
Mathematics
Trigonometric Equations
The number of ways in which 5 girls and 3 boys can be seated in a row so the no two boys are together is
KCET - 2018
KCET
Mathematics
Permutations
The value of
lim
x
→
0
∣
x
∣
x
\displaystyle\lim_{x\to0} \frac{\left|x\right|}{x}
x
→
0
lim
x
∣
x
∣
is
KCET - 2018
KCET
Mathematics
Limits
Let A be a square matrix of order
3
×
3
3 \times 3
3
×
3
, then
∣
5
A
∣
=
|5A| =
∣5
A
∣
=
KCET - 2018
KCET
Mathematics
Matrices
The value of determinant
∣
a
−
b
b
+
c
a
b
−
a
c
+
a
b
c
−
a
a
+
b
c
∣
\begin{vmatrix}a-b&b+c&a\\ b-a&c+a&b\\ c-a&a+b&c \end{vmatrix}
a
−
b
b
−
a
c
−
a
b
+
c
c
+
a
a
+
b
a
b
c
is
KCET - 2018
KCET
Mathematics
Properties of Determinants
If
∣
x
+
5
∣
≥
10
|x + 5| \ge \,10
∣
x
+
5∣
≥
10
, then
KCET - 2018
KCET
Mathematics
linear inequalities
The probability of happening of an event A is 0.5 and the of B is 0.3 .If A and B are mutually exclusive events, then the probability of neither A nor B is
KCET - 2018
KCET
Mathematics
Probability
The locus represented by
x
y
+
y
z
=
0
xy + yz = 0
x
y
+
yz
=
0
is
KCET - 2018
KCET
Mathematics
Three Dimensional Geometry
The equation of the line parallel to the line
3
x
−
4
y
+
2
=
0
3x - 4y + 2 = 0
3
x
−
4
y
+
2
=
0
and passing through
(
−
2
,
3
)
(-2, 3 )
(
−
2
,
3
)
is
KCET - 2018
KCET
Mathematics
Straight lines
The total number of terms in the expansion of
(
x
+
a
)
47
−
(
x
−
a
)
47
{(x+a)^{47} - (x-a)^{47}}
(
x
+
a
)
47
−
(
x
−
a
)
47
after simplification is
KCET - 2017
KCET
Mathematics
Binomial theorem
The function
f
(
x
)
=
x
2
+
2
x
−
5
f (x) = x^2 + 2x - 5
f
(
x
)
=
x
2
+
2
x
−
5
is strictly increasing in the interval
KCET - 2017
KCET
Mathematics
Differentiability
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