Q. There are 30 socks in a bag. 30% is in blue color. What is the probability to take two blue socks?

• out of 30% 30 socks are blue => out of 30 9 socks are blue in color.
  probability of selecting two blue socks out of 9 socks is 9C2.
  
  so the required answer is :
  (probability of selecting two blue socks out of 9 socks) /(Probability of selecting 2 socks out of 30 socks)
  
  => (9C2) / (30C2)
  => 36 / 435
  => 12/145
  
  
• 10 years agoHelpfull: Yes(33) No(0)
• 2 socks out of 30 socks can be selected in 30 C 2 ways
  2 blue socks out of 9 blue socks can beselected in 9 C 2 ways.
  So, the required anser is 9*8/30*29 = 12/145
  
  Therequire answer is 12/145
• 10 years agoHelpfull: Yes(5) No(0)
• 10% of 30= 3, hence 30% will be 9
  probablity of selecting 2 blue socks out of 9 blue socks will be 9C2
  and probablity of selecting 2 blue socks out of 30 socks will be 30C2
  so overall probablity is 9C2/30C2 = 36/435 = 12/145
• 10 years agoHelpfull: Yes(4) No(0)