a circular board of radius 1 foot is at a distance of 20 feet from you. you throw a dart at it hits the dartboard at some point Q in the circle. what is the probability that Q is closer to the center of the circle than the periphery?
a)0.75
b)1
c)0.25
d)0.5

• their are four condition.
  first---throw dart outside of circle
  second--throw dart on peri of circle
  third--throw dart near to radi of circle
  four--on the radi..
  so ans===(1/4) ==.25
• 13 years agoHelpfull: Yes(5) No(0)
• suppose a smaller circle of half radius inside the arger circle,
  then the required probaaility is given as=(area of smaller circle)/(area of larger circle)
  
  so that
  
  prob=(pi*(r/2)^2)/(pi*r^2)
  =1/4
  =0.25
• 13 years agoHelpfull: Yes(5) No(0)
• we know that
  probability=favourable/unfavourable,
  favourable case= when dart hits upto 12 radius
  unfavourable case=total radius of circle
  probability= [pi*(12)^2]/[pi*(1)^2]
  = 1/4=0.25
• 13 years agoHelpfull: Yes(1) No(0)
• for this (1/2)*(1/2) so answer is .25 .... if this question s asked for closer to perriphery thn answer will be 0.75
• 13 years agoHelpfull: Yes(0) No(0)
• it will be closer to center if it made half radius o the circle means 1/2 foot.
  probability
  = (1/2)^2 / 1^2 =1/4 =.25 :)
• 13 years agoHelpfull: Yes(0) No(0)
• answer is 0.25
  
  probability of hitting the board is 1
  
  probability of falling near to center is (pi*(r/2)^2) / (pi*(r)^2)
  
  since inner area = pi * (r/2)^2
  total area = pi * r^2
• 13 years agoHelpfull: Yes(0) No(1)
• radius of smaller circle to radius of larger circle
  i.e (1/2)2/(1/2)=0.25
• 13 years agoHelpfull: Yes(0) No(1)