Let $A={2,3,4,5,\ldots,16,17,18}$. Let $\approx$ be the equivalence relation on $A \times A$ cartesian product of $A$ and $A$, defined by $(a,b)\approx(c,d)$ if $ad=bc$, then the number of ordered pairs of the equivalence class of $(3,2)$ is
Previous 10 Questions — AMU MCA 2019
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Let $Y={1,2,3,4,5},; A={1,2},; B={3,4,5}$ and $\phi$ denotes null set. If $(A \times B)$ denotes cartesian product of t…
Topic: AMU MCA 2019
An investigator interviewed $100$ students to determine the performance of three drinks milk, coffee and tea. The inves…
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If the sum of the coefficient in the expansion of $(x + y)^n$ is $1024$, then the value of the greatest coefficient in …
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A dictionary is printed consisting of $7$ letters words only that can be made with letters of word $CRICKET$. If the wo…
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The number of ways in which $9$ persons can be divided into three equal groups is
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If $n$ is a positive integer, then $(1+i)^n + (1-i)^n$ is equal to
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If $P, Q, R, S$ are represented by the complex numbers $4+i, 1+6i, -4+3i, -1-2i$ respectively, then $PQRS$ is a
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If $\omega$ is a complex cube root of unity, then the value of
$\dfrac{p + q\omega + r\omega^2}{r + p\omega + q\omega^2…
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A real value of $x$ will satisfy the equation $\left(\dfrac{3 - 4ix}{3 + 4ix}\right)=\alpha - i\beta; (\alpha,\beta \te…
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The standard deviation of a variable $x$ is $10$. Then the standard deviation of $50 + 5x$ is
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If $a, b$ be two fixed positive integers such that $f(a + x)= b + \left[b^3 + 1 - 3b^2 f(x) + 3b{f(x) - (f(x))^3}\right…
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The domain of the function $f(x)=\log_{3+x}(x^2 - 1)$ is
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The value of $\cot 70^\circ + 4\cos 70^\circ$ is
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The equation $\sin x + \sin y + \sin z = -3$ for $0 \le x \le 2\pi,; 0 \le y \le 2\pi,; 0 \le z \le 2\pi$ has
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If $\theta = \sin^{-1} x + \cos^{-1} x - \tan^{-1} x, x \ge 0$ then the smallest interval in which $\theta$ lies is
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Let $A, B$ and $C$ are the angles of a plain triangle and $\tan\left(\dfrac{A}{2}\right)=\dfrac{1}{3},; \tan\left(\dfra…
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If $\alpha, \beta; (\alpha \ne \beta)$ satisfies the equation $a\cos\theta + b\sin\theta = c$, then the value of $\tan\…
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A ray of light passing through the point $(1,2)$ is reflected on the $x$-axis at a point $P$ and passes through the poi…
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The equation $4x^2 - 24xy + 11y^2 = 0$ represents
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The length of the chord joining the points in which the straight line $\dfrac{x}{3} + \dfrac{y}{4} = 1$ cuts the circle…
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