1800-150-456-789
FlagBACK
Flag Analytical Geometry> probability...
question mark

Q1. A and B are 2 independent witnesses in a case.The probability that A will speak the truth is t1 and the probability that B will speak the truth is t2.If both A and B agree on a certain statement,what is the probability that the statement is true?Q2. A fair coin is tossed n times.Let X be the no. of times that heads comes up.If P(X=4), P(X=5) and P(X = 6) are in A.P. find the value of n.

Rohan Anmol , 13 Years ago
Grade 12
anser 1 Answers
yazali midhun

Last Activity: 13 Years ago

for qQ2 ,the format of data is in form of binomial distribution.

as it is case of tossing a coin,P(x=r) =nCr (1/2)n

so nC4,nC5,nC6 are in ap

so n=7 or 14.

Provide a better Answer & Earn Cool Goodies

Enter text here...
star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments


Ask a Doubt

Get your questions answered by the expert for free

Enter text here...

Other Related Questions on analytical geometry

question mark
The locus of the point represented by x= t^2 +t+1 and y=t^-t+1 is
analytical geometry
0 Answer Available

Last Activity: 2 Years ago

question mark
show that the centroids of the triangles of which three perpendiculars lie along the lines y=m1x,y=m2x,y=m3x lie on y(3+m2m3+m3m2+m1m2)=x(m1+m2+m3+3m1m2m3)
analytical geometry
0 Answer Available

Last Activity: 2 Years ago

question mark
show that the equation (ab-h²)(ax²+2hxy+by²+2gx+2fy)+af²+bg²-2fgh=0 represent a pair of straight lines and that these straight lines form a rhombus with the lines ax²+2hxy+by²=0
analytical geometry
0 Answer Available

Last Activity: 2 Years ago

question mark
A circle has its center on straight line 5x-2y+1=0 and cuts the x axis at two points whose absciasse are -5,3 find equation of the circle and it's radius.
analytical geometry
0 Answer Available

Last Activity: 2 Years ago

question mark
Prove that ax^2+by^2+cz^2 +2ux+2vy+2wz+d=0 represent a cone if u^2/a+v^/b+w^2/c=d
analytical geometry
0 Answer Available

Last Activity: 2 Years ago