Q1:
19th May Shift 1
Easy
common
The general solution of the given differential equation $\frac{dy}{dx} = \frac{3e^{2x}+3e^{4x}}{e^{x}+e^{-x}}$ (where C is an arbitrary constant)
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19th May Shift 1
Easy
common
The general solution of the given differential equation $\frac{dy}{dx} = \frac{3e^{2x}+3e^{4x}}{e^{x}+e^{-x}}$ (where C is an arbitrary constant)
19th May Shift 1
Medium
common
Given that $Y_{3\times k}$, $W_{n\times 3}$ and $P_{p\times k}$ are matrices of specified order, then the condition for n, p, k so that $3PY + 2WY$ is well defined, is:
19th May Shift 1
Medium
common
If $A = \begin{bmatrix} 1 & 0 \\ -1 & 7 \end{bmatrix}$, $I = \begin{bmatrix} 1 & 0 \\ 0 & 1 \end{bmatrix}$, then the value of k so that $A^2 = 8A + kI$ is
19th May Shift 1
Easy
common
If $y = 500e^{7x} + 600e^{-7x}$, then $\frac{d^2y}{dx^2}$ equals :
19th May Shift 1
Medium
common
The maximum area of a rectangle inscribed in a circle of radius $3\sqrt{2}$ cm, is:
19th May Shift 1
Medium
common
$\int \frac{dx}{(a^2-x^2)^{3/2}}$ is equal to: (where C is an arbitrary constant)
19th May Shift 1
Easy
common
The solution of the initial value problem $x\frac{dy}{dx} = 2, y(1) = 2$ is
19th May Shift 1
Medium
common
Match List-I with List-II | List-I | List-II | |---|---| | (A) $y + \frac{dy}{dx} = \frac{1}{4}\int y\,dx$ | (I) Order 1, Degree 1 | | (B) $y = \frac{dy}{dx} + \frac{C}{dy/dx}$ | (II) Order 2, Degree 2 | | (C) $(xy^2+x)dx + (y-x^2)dy = 0$ | (III) Order 2, Degree 1 | | (D) $\left[\left\{1+\left(\frac{dy}{dx}\right)^2\right\}^{3/2}/\frac{d^2y}{dx^2}\right] = K$ | (IV) Order 1, Degree 2 | Choose the correct answer from the options given below:
19th May Shift 1
Hard
common
If $A = \begin{bmatrix} a & b \\ c & \frac{1+bc}{a} \end{bmatrix}$, then $aA^{-1}$ is equal to which of the following? [I is the identity matrix of order 2]
19th May Shift 1
Medium
common
If $A = \begin{bmatrix} 2 & -3 & 5 \\ 6 & 0 & 4 \\ 1 & 5 & -7 \end{bmatrix}$, then which of the following statements are TRUE? [where $A_{ij}$ is the cofactor of the (i, j)th element, $a_{ij}$ of matrix A, $1 \gt i, j \le 3$.] (A) $a_{11}A_{31} = -24$ (B) $a_{12}A_{32} = -66$ (C) $a_{13}A_{33} = -90$ (D) $a_{21}A_{21} = -24$ Choose the correct answer from the options given below:
19th May Shift 1
Medium
common
For the function $f(x) = \frac{x^4}{4} - 2x^3 + \frac{11}{2}x^2 - 6x$, which of the following statements are TRUE? (A) Critical points of $f(x)$ are $x = 1, 2$ and $3$. (B) $f(x)$ is increasing over $(1,2)$. (C) $f(x)$ is decreasing over $(2,3)$. (D) $f(x)$ is increasing over $(3,\infty)$. Choose the correct answer from the options given below:
19th May Shift 1
Easy
common
The maximum value of $z = 4x + 2y$, subjected to the constraints: $2x + 3y \le 18$, $x + y \ge 5$; $x, y \ge 0$, is
19th May Shift 1
Medium
common
The value of integral $I = \int_{3}^{5} \frac{x^2}{(x-1)(x-2)}\,dx$ is
19th May Shift 1
Easy
common
A die is thrown twice and the sum of the numbers appearing is observed to be 6. Then the probability that the number 4 has appeared at least once, is
19th May Shift 1
Medium
common
The area of the region bounded by the line $3y = -2x + 7$, x-axis and the lines $x = 0$ and $x = 4$, is (in Sq. units)
19th May Shift 1
Easy
core
Match List-I with List-II | List-I (Differential equation) | List-II (Integrating factor) | |---|---| | (A) $\frac{dy}{dx} + 2y = x$ | (I) $e^x$ | | (B) $\frac{dy}{dx} + \left(\frac{2}{x}\right)y = x^2$ | (II) $e^{2x}$ | | (C) $\frac{dy}{dx} - \left(\frac{2}{x}\right)y = \sin x$ | (III) $\frac{1}{x^2}$ | | (D) $\frac{dy}{dx} + y = e^{-x}$ | (IV) $x^2$ | Choose the correct answer from the options given below:
19th May Shift 1
Medium
core
A man is known to speak truth 8 out of 11 times. He takes out two balls from a bag containing 3 white, 2 black and 5 red balls. What is the probability that he reports both the balls to be white?
19th May Shift 1
Medium
core
If $A = \begin{bmatrix} 1 & -3 \\ 2 & 0 \end{bmatrix}$, then which of the following statement(s) is/are TRUE? (A) Matrix A is non-singular (B) $|3A| = 54$ (C) $|adjA| = 36$ (D) $A^2 = \begin{bmatrix} -5 & -3 \\ 2 & -6 \end{bmatrix}$ Choose the correct answer from the options given below:
19th May Shift 1
Easy
core
The sum of the order and degree of the differential equation: $\left(x + \frac{dy}{dx}\right)^2 = \frac{dy}{dx} + 1$ is
19th May Shift 1
Easy
core
At $x = 2$, $f(x) = [x]$ is [where [.] is greatest integer function]
19th May Shift 1
Easy
core
Let A (1, 3), B (0, 0) and C (k, 0) be three points such that area of $\Delta(ABC) = 3$ sq. units, then the value of k is:
19th May Shift 1
Easy
core
If $\theta$ is the angle between the lines $L_1$ and $L_2$, whose direction cosines are $l_1, m_1, n_1$ and $l_2, m_2, n_2$ respectively, then Match List-I with List-II | List-I | List-II | |---|---| | (A) $\cos\theta$ | (I) $l_1l_2+m_1m_2+n_1n_2$ | | (B) $\sin\theta$ | (II) $l_1l_2+m_1m_2+n_1n_2=0$ | | (C) $L_1$ and $L_2$ are perpendicular | (III) $\frac{l_1}{l_2}=\frac{m_1}{m_2}=\frac{n_1}{n_2}$ | | (D) $L_1$ and $L_2$ are parallel | (IV) $\sqrt{\sum(m_1n_2-m_2n_1)^2}$ | Choose the correct answer from the options given below:
19th May Shift 1
Easy
core
If A is a 3-rowed square matrix and $|A| = 5$, then $|adjA|$ is equal to
19th May Shift 1
Easy
core
The value of $\int_{0}^{1} \frac{e^x}{1+e^{2x}}\,dx$ is
19th May Shift 1
Medium
core
For the functions $f(x) = x^2$ and $g(x) = x^3$, which of the following statements are TRUE? [where N is the set of natural numbers and Z is the set of integers] (A) $f: N \to N$ is one-one but not onto. (B) $f: Z \to Z$ is neither one-one nor onto. (C) $g: N \to N$ is one-one but not onto. (D) $g: Z \to Z$ is one-one but not onto. Choose the correct answer from the options given below:
19th May Shift 1
Medium
core
The corner points O, A, B, C, D and E of the bounded feasible region determined by the system of linear constraints are shown in the given figure. If $z = 3x - 4y$ be the objective function, then the minimum of z, is: <img src="https://balti.afterboards.in/vJkqCBUToInGq31" width="400px"/>
19th May Shift 1
Medium
core
Match List-I with List-II | List-I | List-II | |---|---| | (A) $f(x) = \begin{cases} x^{10}-1 & , x \leq 1 \\ x^2 & , x > 1 \end{cases}$ | (I) is continuous at all points of domain | | (B) $g(x) = [x]$, $[x]$ denotes the greatest integer function | (II) is continuous at $x = 0$ | | (C) $h(x) = \begin{cases} \dfrac{\sin x}{x} & , x < 0 \\ x+1 & , x \geq 0 \end{cases}$ | (III) is discontinuous at $x = -2$ | | (D) $p(x) = \begin{cases} \dfrac{x}{\left\vert x \right\vert} & , x < 0 \\ -1 & , x \geq 0 \end{cases}$ | (IV) is discontinuous at $x = 1$ | Choose the correct answer from the options given below:
19th May Shift 1
Medium
core
Match List-I with List-II [c is an arbitrary constant] | List-I | List-II | |---|---| | (A) $\int \frac{\sin^2 x - \cos^2 x}{\sin^2 x \cos^2 x}\,dx$ | (I) $\tan x - x + c$ | | (B) $\int \frac{\sec^2 x}{\text{cosec}^2 x}\,dx$ | (II) $2\tan x - 3\sec x + c$ | | (C) $\int \sec x(\sec x + \tan x)\,dx$ | (III) $\tan x + \cot x + c$ | | (D) $\int \frac{2-3\sin x}{\cos^2 x}\,dx$ | (IV) $\tan x + \sec x + c$ | Choose the correct answer from the options given below:
19th May Shift 1
Easy
core
Let $A = \{0, 1, 2, 3\}$ and R be a relation on set A defined as $R = \{(0,0), (0,1), (0,3), (1,0), (1,1), (2,2), (3,0), (3,3)\}$, then the relation R is
19th May Shift 1
Easy
core
If $\vec{a}$ and $\vec{b}$ are two collinear vectors, then which of the following statements is/are incorrect? (A) $\vec{b} = \lambda\vec{a}$, for some scalar $\lambda$. (B) Always $\vec{a} = \pm\vec{b}$. (C) the respective components of $\vec{a}$ and $\vec{b}$ are proportional. (D) both vectors $\vec{a}$ and $\vec{b}$ always have same direction. Choose the correct answer from the options given below:
19th May Shift 1
Medium
core
If $y = \cot^{-1}\left(\frac{1-x}{1+x}\right)$ then $\frac{dy}{dx}$ equals
19th May Shift 1
Medium
core
Let $\vec{a} = (\hat{i}+4\hat{j}+2\hat{k})$, $\vec{b} = (3\hat{i}-2\hat{j}+7\hat{k})$, $\vec{c} = (2\hat{i}-\hat{j}+4\hat{k})$. A vector $\vec{d}$, which is perpendicular to both $\vec{a}$ and $\vec{b}$, such that $\vec{c}.\vec{d} = 18$, is
19th May Shift 1
Medium
core
The height of a closed cylinder of given surface area and maximum volume is equal to the
19th May Shift 1
Easy
core
The function $f(x) = 3x + \cos 3x$ is (where R is set of real numbers)
19th May Shift 1
Hard
core
$\int \frac{x^9}{(4x^2+1)^6}\,dx$ is equal to: [where c is an arbitrary constant]
19th May Shift 1
Easy
core
Match List-I with List-II | List-I | List-II | |---|---| | (A) $P(A \cap B) = P(A).P(B)$ | (I) $\frac{P(B \cap A)}{P(A)}, P(A) \ne 0$ | | (B) $\frac{P(S \cap B)}{P(B)}$, S = Sample space | (II) A, B are independent events | | (C) $P(B/A) =$ | (III) $P(\bar{A} \cap \bar{B})$ | | (D) $P(\overline{A \cup B})$ | (IV) 1 | Choose the correct answer from the options given below:
19th May Shift 1
Medium
core
The shortest distance between the lines whose vector equations are $\vec{r} = (6\hat{i}+2\hat{j}+2\hat{k}) + \lambda(\hat{i}-2\hat{j}+2\hat{k})$ and $\vec{r} = (-4\hat{i}-\hat{k}) + \mu(3\hat{i}-2\hat{j}-2\hat{k})$
19th May Shift 1
Medium
core
The matrix X such that it satisfies the equation: $X\begin{bmatrix} 3 & 2 \\ 1 & -1 \end{bmatrix} = \begin{bmatrix} 4 & 1 \\ 2 & 3 \end{bmatrix}$ is
19th May Shift 1
Medium
core
For $f(x) = x^3 - 6x^2 + 9x + 15$, which of the following statements are TRUE? (A) $f'(x) = 3x^2 - 12x + 15$. (B) The critical points are 3 and 1. (C) $x = 1$ is a point of local maxima. (D) Local minimum value is 19. Choose the correct answer from the options given below:
19th May Shift 1
Medium
core
A man speaks the truth 8 out of 10 times. A die is tossed. He reports that it was 5. What is the probability that it was actually 5?
19th May Shift 1
Medium
core
The general solution of the differential equation $\frac{dy}{dx} + y\cot x = 2\cos x$ is (Where C is an arbitrary constant)
19th May Shift 1
Medium
core
Match List-I with List-II | List-I | List-II | |---|---| | (A) $(\vec{a}-\vec{b}) \times (\vec{a}+\vec{b})$ equals | (I) $\vec{0}$ | | (B) $\vec{a} = (3\hat{i}+\hat{j}-4\hat{k}), \vec{b} = (6\hat{i}+5\hat{j}-2\hat{k})$, then $\left\vert \vec{a}\times\vec{b} \right\vert$ equals | (II) $5$ | | (C) $\vec{a}\times(\vec{b}+\vec{c}) + \vec{b}\times(\vec{c}+\vec{a}) + \vec{c}\times(\vec{a}+\vec{b}) =$ | (III) $2(\vec{a}\times\vec{b})$ | | (D) Projection of vector $(\hat{i}+3\hat{j}+7\hat{k})$ on vector $(2\hat{i}-3\hat{j}+6\hat{k})$ is | (IV) $27$ | Choose the correct answer from the options given below:
19th May Shift 1
Medium
core
Which of the following statements is/are TRUE? (A) The angle between the lines whose direction ratios are proportional to (4, -3, 5) and (3, 4, 5) is 60°. (B) If A(1,2,3) and B(2, 0, 5) are two points on a line, then its direction ratios are proportional to 1, -2, 2. (C) The direction cosines of z-axis are 0, 0, 1. (D) The vector equation of a line which passes through the point with position vector $3\hat{i}-\hat{j}+\hat{k}$ and is in the direction of $2\hat{i}+3\hat{j}+\hat{k}$ is $\vec{r} = (2\hat{i}+3\hat{j}+\hat{k}) + \lambda(3\hat{i}-\hat{j}+\hat{k})$, where $\lambda$ is a parameter. Choose the correct answer from the options given below:
19th May Shift 1
Easy
core
Two thirds of the students in a class are boys and the rest are girls. It is known that the probability of a girl getting a first class is 0.25 and that of a boy getting a first class is 0.28, then the probability that a student chosen at random will get first class marks in the subject is
19th May Shift 1
Easy
core
If $z = px + qy$, where $p, q > 0$, is the objective function. Then the condition on p and q so that the maximum value of z occurs at A(4, 10) and B(6, 8), is:
19th May Shift 1
Easy
core
The value of the integral $\int_{-6}^{0} |x+3|\,dx$ is
19th May Shift 1
Easy
core
The area bounded by the curve $y^2 = 2x$ and the lines $y = 2, y = 4$ and y-axis, is
19th May Shift 1
Easy
core
If $P = \begin{bmatrix} 1 & 2 \\ -1 & 3 \end{bmatrix}$, $Q = \begin{bmatrix} 4 & 0 \\ 1 & 5 \end{bmatrix}$ and $R = \begin{bmatrix} 2 & 0 \\ 1 & -2 \end{bmatrix}$, then which of the following are TRUE? (A) $(P^T)^T = P^T$ (B) $(P-Q)R = PR - QR$ (C) $(P-Q)^T = Q^T - P^T$ (D) $(PQ)^T = Q^TP^T$ Choose the correct answer from the options given below:
19th May Shift 1
Medium
core
Let A be the matrix $\begin{bmatrix} 3 & -4 \\ 1 & -1 \end{bmatrix}$. If A is expressed as the sum of P and Q, where P is a symmetric and Q is a skew symmetric matrix, then which of the following options define P and Q correctly?
19th May Shift 1
Easy
core
The position vector of a point R which divides the line joining the points A(-2, 1, 3) and B(3, 5, -2) internally in the ratio 2:1, is
19th May Shift 1
Easy
applied
Match List-I with List-II | List-I (Definite Integral) | List-II (Value) | |---|---| | (A) $\int_{1}^{2} e^x\,dx$ | (I) $\frac{e^2(e^2-1)}{2}$ | | (B) $\int_{0}^{1} e^x\,dx$ | (II) $\frac{(e^2-1)}{2}$ | | (C) $\int_{1}^{2} e^{2x}\,dx$ | (III) $e-1$ | | (D) $\int_{0}^{1} e^{2x}\,dx$ | (IV) $e(e-1)$ | Choose the correct answer from the options given below:
19th May Shift 1
Hard
applied
If the sum of the lengths of hypotenuse and a side of a right angled triangle is given, then the area of the triangle is maximum when angle between them is:
19th May Shift 1
Medium
applied
The supply function for a commodity is $p = x^2 + x + 3$. The producer's surplus when $x = 3$ is,
19th May Shift 1
Easy
applied
The random variable X has the following probability distribution: | X | 1 | 2 | 3 | 4 | 5 | |---|---|---|---|---|---| | P(X) | $\frac{1}{10}$ | $\frac{1}{10}$ | $\frac{1}{3}$ | k | $\frac{1}{3}$ | The correct value of k is:
19th May Shift 1
Easy
applied
The monthly expectation of a two-wheeler accident at a particular railway crossing is 0.02. What is the probability that in a specific month, no accident occurred? (given $e^{-0.02} = 0.9802$)
19th May Shift 1
Medium
applied
Match List-I with List-II | List-I (Differential equation) | List-II (The sum of degree and order of the differential equation) | |---|---| | (A) $x\frac{d^2y}{dx^2} = \left(1+\left(\frac{dy}{dx}\right)^2\right)^{\frac{1}{3}}$ | (I) 2 | | (B) $x\frac{d^2y}{dx^2} = \left(2-\frac{dy}{dx}\right)^{\frac{1}{7}}$ | (II) 9 | | (C) $3+\frac{dy}{dx} = y+\frac{d^3y}{dx^3}$ | (III) 4 | | (D) $\frac{dy}{dx} = x+3$ | (IV) 5 | Choose the correct answer from the options given below:
19th May Shift 1
Medium
applied
The number that satisfies the inequality $\frac{29}{4} < \frac{x+20}{4} < 8$ is
19th May Shift 1
Easy
applied
Which of the following are TRUE? (A) The inverse of $\begin{bmatrix} 3 & -3 \\ 2 & 7 \end{bmatrix}$ is $\frac{1}{27}\begin{bmatrix} 7 & 3 \\ -2 & 3 \end{bmatrix}$. (B) The determinant of $\begin{bmatrix} 3 & -3 \\ 2 & 7 \end{bmatrix}$ is 29. (C) The inverse of $\begin{bmatrix} 3 & -3 \\ 2 & 7 \end{bmatrix}$ is $\frac{1}{29}\begin{bmatrix} 7 & 3 \\ -2 & 3 \end{bmatrix}$. (D) The adjoint of $\begin{bmatrix} 3 & -3 \\ 2 & 7 \end{bmatrix}$ is $\begin{bmatrix} 7 & 3 \\ -2 & 3 \end{bmatrix}$. Choose the correct answer from the options given below:
19th May Shift 1
Easy
applied
If $A = \begin{bmatrix} 1 & 2 & -3 \end{bmatrix}$ and $B = \begin{bmatrix} 1 & 3 \\ 7 & -8 \\ 1 & 2 \end{bmatrix}$, then which of the following are true? (A) AB is a $2 \times 3$ matrix (B) $B^2$ is a $3 \times 3$ matrix (C) BA is not possible (D) $A^3$ is not possible Choose the correct answer from the options given below:
19th May Shift 1
Medium
applied
Three taps A, B and C can fill a tank in 12 minutes, 15 minutes and 20 minutes respectively. If tap A is opened all the time while tap B and C are opened for 1 minute each alternately such that tap B opened first, then the time taken to fill the tank is :
19th May Shift 1
Easy
applied
Match List-I with List-II | List-I | List-II | |---|---| | (A) It describes the accuracy of a sampling method. | (I) Confidence interval | | (B) It describes the uncertainity of a sampling method. | (II) Hypothesis | | (C) It is used to express the precision and uncertainity of a sampling process. | (III) Margin of error | | (D) An educated guess which needs to be tested. | (IV) Confidence level | Choose the correct answer from the options given below:
19th May Shift 1
Easy
applied
Given a matrix $A = \begin{bmatrix} 0 & 3 & -8 \\ -3 & 0 & 13 \\ 8 & -13 & 0 \end{bmatrix}$. Which of the following statements is/are TRUE? (A) The matrix A is a skew-symmetric matrix. (B) The matrix A is a symmetric matrix. (C) The matrix A is a singular matrix. (D) The matrix A is a non-singular matrix. Choose the correct answer from the options given below:
19th May Shift 1
Easy
applied
If X is normally distributed with mean 30 and standard deviation 5, the value of $P(26 \le X \le 34)$ is: (Where $P(0 \le Z \le 0.8) = 0.2881$)
19th May Shift 1
Easy
applied
While solving an LPP, the corner points of a bounded feasible region were found to be (0,0), (1, 9), (3, 7), (4, 5.5) and (10, 0). The objective function $Z = 4x + y$ will maximise at:
19th May Shift 1
Medium
applied
A person has set up a sinking fund in order to have ₹ 20,000 in 10 years for his children's education. The amount to set aside each quarter into an account paying 6% per annum compounded quarterly is: [use $(1.015)^{40} = 1.8140$]
19th May Shift 1
Easy
applied
A container contains 100 litres of acid. From the container, 10 litres acid was taken out and replaced by equal amount of water. This process was repeated further twice, then the amount of acid left in the container is:
19th May Shift 1
Easy
applied
Jemina invested ₹ 50,000 in a mutual fund in 2019. The value of the mutual fund increased to ₹ 80,000 in 2024. The percentage of CAGR (Compound Annual Growth Rate) of her investment is: [Use $(1.6)^{1/5} = 1.098$]
19th May Shift 1
Medium
applied
The possible value (s) of x such that $28 \equiv x(mod\ 6)$ are :- (A) -2 (B) 4 (C) 6 (D) 10 Choose the correct answer from the options given below:
19th May Shift 1
Medium
applied
Usain Bolt runs a 100 m race and defeats his rival by 1 m. If Usain's speed was 9 m/s, the speed of the rival was :
19th May Shift 1
Medium
applied
The absolute maximum value of the function $f(x) = 2x^3 - 15x^2 + 36x + 7$ on the interval [1,5] is
19th May Shift 1
Medium
applied
If $A^T = \begin{bmatrix} a & b \\ c & d \end{bmatrix}$ and $A^{-1} = \begin{bmatrix} p & q \\ r & s \end{bmatrix}$, then
19th May Shift 1
Easy
applied
The present value of a perpetuity of ₹x at the end of every 6 months is ₹4,00,000. If money is worth 6% per annum compounded semi-annually, what is value of x ?
19th May Shift 1
Easy
applied
Mrs. Soma takes a loan of ₹ 5,00,000 with 10% annual interest rate for 5 years. What will be her EMI under flat rate system?
19th May Shift 1
Medium
applied
Match List-I with List-II | List-I | List-II | |---|---| | (A) It is the amount the bond issuer pays at maturity. | (I) Coupon rate | | (B) It is the rate at which a bond yield interest. | (II) Face value | | (C) It is the annual interest rate paid by the bond issuer to the bond holder. | (III) Nominal rate of interest | | (D) The price at which the bond is sold to buyers at the time of issue. | (IV) Redemption price | Choose the correct answer from the options given below:
19th May Shift 1
Easy
applied
Tamanna was researching on problem of under-age workers at factories. She met a suitable child and interviewed him. He put her in contact with three another workers. Those three workers brought her in contact with ten other underage workers. This process of sampling is known as:
19th May Shift 1
Easy
applied
Match List-I with List-II | List-I | List-II | |---|---| | (A) $\begin{bmatrix} 5 & 3 \\ -7 & 1 \end{bmatrix} + \begin{bmatrix} 7 & 3 \\ 7 & 2 \end{bmatrix}$ | (I) Identity matrix | | (B) $\begin{bmatrix} 5 & 3 \\ -7 & 1 \end{bmatrix} + \begin{bmatrix} -4 & -3 \\ -6 & 0 \end{bmatrix}$ | (II) Upper Triangular Matrix | | (C) $\begin{bmatrix} 5 & -3 \\ -2 & -1 \end{bmatrix} + \begin{bmatrix} -5 & 3 \\ 2 & 1 \end{bmatrix}$ | (III) Zero Matrix | | (D) $\begin{bmatrix} 5 & 13 \\ -2 & 6 \end{bmatrix} + \begin{bmatrix} -4 & -13 \\ 2 & -5 \end{bmatrix}$ | (IV) Lower Triangular Matrix | Choose the correct answer from the options given below:
19th May Shift 1
Easy
applied
Irregular variations in a time series is :
19th May Shift 1
Medium
applied
The value of $\int_{0}^{3} \frac{\sqrt{x}}{\sqrt{3-x}+\sqrt{x}}\,dx$ is
19th May Shift 1
Medium
applied
For a certain data $(x_i, y_i)$, $i = 1,2,...,7$: $\sum_{i=1}^{7} y_i = 246$ and $\sum_{i=1}^{7} u_iy_i = 29$, $\sum_{i=1}^{7} u_i^2 = 28$ where $u_i = x_i - 2004$, then straight line trend by the method of least square is :
19th May Shift 1
Medium
applied
The value of an item costing ₹ x depreciates in such a way that after 6 years the value is just a quarter of original value. The annual depreciation is:
19th May Shift 1
Easy
applied
Two cards are drawn successively with replacement from a well shuffled pack of 52 playing cards. Which of the following is correct probability distribution of number of Queens(X) as $\binom{X}{P(X)}$?
19th May Shift 1
Medium
applied
The shaded unbounded area of an LPP is the result of constraints: <img src="https://balti.afterboards.in/y0blO5vsYu6Kium" width="400px"/>
19th May Shift 1
Medium
applied
The interval in which the function $f(x) = \log_e(2+x) - \frac{2x}{2+x}$ is increasing is
19th May Shift 1
Medium
applied
A random sample of 17 values from a normal population has a mean of 105 cm and the sample standard deviation is 8.489. If normal population mean is 110 cm, then the upper limit of confidence at 5% level of significance is : (Given $t_{16}(0.05) = 2.12$)
19th May Shift 1
Easy
applied
A man rows a boat downstream 30 km and upstream 20 km. It takes him 5 hours to cover each distance. Which of the following are TRUE? (A) The speed of the boat in still water is 10 km/hr. (B) The speed of the boat in still water is 5 km/hr. (C) The speed of the current is 1 km/hr. (D) The speed of the current is 6 km/hr. Choose the correct answer from the options given below:
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