class 12

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JEE Advanced

A real gas behaves like an ideal gas if its

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A manufacturer has three machine operators A, B and C. The first operator A produces 1% defective items, where as the other two operators B and C produce 5% and 7% defective items respectively. A is on the job for 50% of the tune, B is on the job for 30% of the time and C is on the job for 20% of the time. A defective item is produced, what is the probability that it was produced by A?

Suppose that $p ,q andr$ are three non-coplanar vectors in $R_{3}$. Let the components of a vector $s$ along $p ,q andr$ be 4, 3 and 5, respectively. If the components of this vector $s$ along $(−p +q +r),(p −q +r)and(−p −q +r)$ are x, y and z, respectively, then the value of $2x+y +z$ is

Let $O$be the origin, and $OX,OY,OZ$be three unit vectors in the direction of the sides $QR$, $RP$, $PQ$, respectively of a triangle PQR.$∣OX×OY∣=$$s∈(P+R)$ (b) $sin2R$$(c)sin(Q+R)$(d) $sin(P+Q)˙$

Let $f:R→R$and $g:R→R$be two non-constant differentiable functions. If $f_{prime}(x)=(e_{(f(x)−g(x))})g_{prime}(x)$for all $x∈R$, and $f(1)=g(2)=1$, then which of the following statement(s) is (are) TRUE?$f(2)<1−(g)_{e}2$(b) $f(2)>1−(g)_{e}2$(c) $g(1)>1−(g)_{e}2$(d) $g(1)<1−(g)_{e}2$

A circle S passes through the point (0, 1) and is orthogonal to the circles $(x−1)_{2}+y_{2}=16$ and $x_{2}+y_{2}=1$. Then (A) radius of S is 8 (B) radius of S is 7 (C) center of S is (-7,1) (D) center of S is (-8,1)

Â·If the normals of the parabola $y_{2}=4x$ drawn at the end points of its latus rectum are tangents to the circle $(x−3)_{2}(y+2)_{2}=r_{2}$ , then the value of $r_{2}$ is

The coefficients of three consecutive terms of $(1+x)_{n+5}$are in the ratio 5:10:14. Then $n=$___________.

Let $a$ and $b$ be two unit vectors such that $a.b=0$ For some $x,y∈R$, let $c=xa+yb+(a×b$ If $(∣c∣=2$ and the vector $c$ is inclined at same angle $α$ to both $a$ and $b$ then the value of $8cos_{2}α$ is