three coins are tossed in the air at the sample time .what are the chances that at least two of the coins will fall tails up?

1: 25
2: 33.33
3: 50
4: 75

• ans 50, total chance 8, 4/8=.50
• 10 years agoHelpfull: Yes(6) No(2)
• ans is 50,no of chances are 4(TTH ,THT, TTT ,HTT).HENCE ANW IS 4/8=1/2=50
• 10 years agoHelpfull: Yes(3) No(0)
• the ans will be 50
• 10 years agoHelpfull: Yes(1) No(1)
• probability of tail coming atleast 2 times is 3/8 and pro. that tail coming 3 times is 1/8... hence 1/8+3/8=1/2=50
• 10 years agoHelpfull: Yes(1) No(1)
• 3:50
  t t t
  t t h
  t h t
  h t t
  there are 4 case of at least two of the coin has tails
  total no of case=8
  case are
  ttt
  tth
  tht
  thh
  htt
  hth
  hht
  hhh
• 10 years agoHelpfull: Yes(1) No(0)
• (1/2)*(1/2)*(1/2)+(1/2)*(1/2)*(1/2)+(1/2)*(1/2)*(1/2)
  =3/8
• 10 years agoHelpfull: Yes(0) No(2)
• ans 50, total chance 8, 4/8=.50
• 10 years agoHelpfull: Yes(0) No(0)
• take success event is tail
  probability of getting tail is p= 1/2
  failure event head (q)=1/2
  probability of getting tail at least two of three coins
  (q+p)^r
  here r=3
  3c2 [(1/2)^2](1/2) +3c3 (1/2)^3=(1/2)=0.50
  
• 9 years agoHelpfull: Yes(0) No(0)
• Sample Set : HTT, THT, TTH, HHT,HTH,THH, HHH, TTT
  Two Tails : HTT, THT, TTH
  Probability: 3/8 (33.33)
• 9 years agoHelpfull: Yes(0) No(1)
• 75
  (1/2 x 1/2 x 1/2) x 3!
• 9 years agoHelpfull: Yes(0) No(0)
• 50
  HHH
  HHT
  HTH
  HTT
  THH
  THT
  TTH
  TTT
• 9 years agoHelpfull: Yes(0) No(0)