A toy train can make 10 sounds sound changes aftr every 4 min, now train is defective and can make only 2 sounds. Find probability that same sound is repeated 3 times consecutively(1 out of)?

• two sounds are available currently...so for one sound probability is 1/2
  so,for three consecutive time probability would be1/2*1/2*1/2
• 13 years agoHelpfull: Yes(16) No(3)
• no.of sounds/(no of sounds)^(consecutive no)
  2/2^3=1/4
• 13 years agoHelpfull: Yes(8) No(11)
• prob is 1/2
  1/2+1/2+1/2
• 13 years agoHelpfull: Yes(0) No(21)
• Probability of choosing one sound out of 2 is = 1/2
  Therefore for 4 consecutive times, 1/2*1/3*1/2*1/2=1/16
  and this can be two types ie. 2*(1/16)=1/8
• 9 years agoHelpfull: Yes(0) No(0)