Processing math: 55%




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21.

 Football teams  T1 and T2 have to play two games against each other. It is assumed that the outcomes of the two games are independent. The probabilities of T1 winning, drawing and losing a game against T2 are  12,16and13 ,respectively. Each team gets 3 points for a win, 1 point for a draw and 0 point for a loss in a game. Let X and Y  denote the total points  scored by teams T1 and T2, respectively, after two games

P(X=Y) is


A) 1136

B) 13

C) 1336

D) 12



22.

 Football teams  T1 and T2 have to play two games against each other. It is assumed that the outcomes of the two games are independent. The probabilities of T1 winning, drawing and losing a game against T2 are  12,16and13 ,respectively. Each team gets 3 points for a win, 1 point for a draw and 0 points for a loss in a game. Let X and Y  denote the total points  scored by teams T1 and T2., respectively, after two games

   P(X>Y) is


A) 14

B) 512

C) 12

D) 712



23.

Let  a,λ,μϵR . Consider the system of linear equation ax+2y=λ and 3x-2y= μ . Which of the following statement(s) is (are ) correct?


A) If a=-3, then the system has infinitely many solutions for all values of λ and μ

B) a3, then the system has a unique solution for all values λ and μ

C) If λ+μ=0, then the system has infinitely many solutions for a=-3

D) If λ+μ0 then the system has no solution a=-3



24.

Let a,b ε R and a2+b20 . Suppose  S=(zϵC:z=1a+ibt,tϵR,t0)  wherei=1 . If z=x+iy and z ε S, then (x,y) lies on


A) the circle with radius 12a and centre (12a,0) for a&gt;0, b0

B) the circle with radius 12a and centre (12a,0) for a<0,b0

C) the X-axis for a0,b=0

D) the Y-axis for a=0,b0



25.

Let P be the point on the parabola  y^{2}=4x , which is at the shortest distance from the centre S of the circle .x^{2}+y^{2}-4x+16y+64=0. Let Q be the point on the circle dividing the line segment  SP internally. Then, 


A) SP=2\sqrt{5}

B) SQ:QP=(\sqrt{5}+1):2

C) the x -intercept of the normal to the parabola at P is 6

D) the slope of the tangent to the circle at Q is \frac{1}{2}



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