12 coins are tossed. Whats is the probability that one and only one turns up tails?

• answer is = 3/1024
  (T,H,H,H,H,H,H,H,H,H,H,H)
  12!/11!=12 ways
  {(1/2)^12}*12= 12/4096= 3/1024
• 10 years agoHelpfull: Yes(14) No(0)
• Total no of chances=12 ways
  no of possible chances=1(1tail remaining heads)
  probability=1/12
• 10 years agoHelpfull: Yes(1) No(6)
• The coin that turns up tail can be any of the 12.
  Required probability = 12 * (1/2^12)=1/4108
  
• 10 years agoHelpfull: Yes(1) No(2)
• total no of tails -can in 1st coin, or second....
  = 1+1+.... = 12
  total no. of chances = 2^12
  
  so the probability is 12/2^12
• 10 years agoHelpfull: Yes(0) No(2)
• 12*1/2*(1/2)^11
• 10 years agoHelpfull: Yes(0) No(2)
• 1/24
  tail prababilirty=1/2
  and 12 coins are ther
  
• 10 years agoHelpfull: Yes(0) No(1)
• no it will 12*1/2*(1/2)^11
  coz we will chose 1 out of 12 and the probability tht it will be tail =1/2
  and head=1/2
• 10 years agoHelpfull: Yes(0) No(1)