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Recent questions tagged q10-b
Questions
One of the four persons John,Rita,Aslam or Gurpreet will be promoted next month.Consequently the sample space consists of four elementary outcomes S={John promoted,Rita promoted,Aslam promted,Gurpreet promoted}.You are told that the chances of John's promotion is same as that of Gurpreet,Rita's chances of promotion are twice as likely as John's,Aslam's chances are four times that of John.If A ={John promoted or Gurpreer promoted} find P(A)
cbse
math
class11
ch16
probability
exemplar
q10-b
sec-c
medium
asked
Jul 7, 2014
by
sreemathi.v
1
answer
If a,b,c are elements of Boolean Algebra,prove that $ab+c(a'+b')=ab+c$.
isc
class12
modelpaper
2004
part-2
sec-b
q10
q10-b
asked
Apr 19, 2013
by
sreemathi.v
0
answers
Find the least distance of the plane $12x+4y+3z=327$ from the sphere $x^2+y^2+z^2+4x-2y-6z=155.$
isc
class12
modelpaper
2005
sec-b
q10
q10-b
asked
Apr 17, 2013
by
sreemathi.v
0
answers
Show that the equation to a sphere passing through three points (2,0,0),(0,2,0) and (0,0,2) and having its centre on the plane $2x+3y+4z=27$ is $x^2+y^2+z^2-6x-6y-6z+8=0.$
isc
class12
modelpaper
2006
sec-b
q10
q10-b
asked
Apr 17, 2013
by
sreemathi.v
0
answers
Prove that the plane $x+2y-z=4$ cuts the sphere $x^2+y^2+z^2-x+z-2=0$ in a circle whose radius is unity.
isc
class12
modelpaper
2007
sec-b
q10
q10-b
asked
Apr 16, 2013
by
sreemathi.v
0
answers
If $A(-1,4,-3)$ is one end of a diameter $AB$ of the sphere $x^2+y^2+z^2-2y+2z-15=0$ then find the coordinates of the other end point B.
isc
class12
modelpaper
2008
sec-b
q10
q10-b
asked
Apr 15, 2013
by
sreemathi.v
0
answers
Find the equation of the sphere which passes through the circle $x^2+y^2-6z-4=0,x+2y+2z=0$ and whose centre lies on the plane $2x-y+z=1.$
isc
class12
modelpaper
2009
sec-b
q10
q10-b
asked
Apr 12, 2013
by
sreemathi.v
0
answers
In any $\Delta ABC$,prove by vector method that $\cos B=\large\frac{c^2+a^2-b^2}{2ca}$.
isc
class12
modelpaper
2010
sec-b
q10
q10-b
asked
Apr 12, 2013
by
sreemathi.v
0
answers
If D,E,F are mid-points of the sides of a triangle ABC,Prove by vector method that : Area of ADEF=$\frac{1}{4}$(Area of $\Delta$ABC).
isc
class12
modelpaper
2011
sec-b
q10
q10-b
asked
Apr 11, 2013
by
sreemathi.v
0
answers
In any triangle ABC,prove by vector method : $\large \frac{a}{sin\;A}=\frac{b}{sin\;B}=\frac{c}{sin\;C}$
isc
class12
modelpaper
2012
sec-b
q10
q10-b
asked
Apr 10, 2013
by
sreemathi.v
0
answers
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