A telegraph has 5 arms and each arm is capable of four distinct positions including the positions including the position of rest. What is the total number of signals that can be made?

• option b:1023.each arm has 4 chances i.e., 4 positions.therefore 4^5.but in that there is a position where all the arms are in rest position so that there will be no signal.so we have to exclude it.so,the answer is 4^5-1=1023.
• 10 years agoHelpfull: Yes(29) No(0)
• each arm is capable of 4 distinct positions=4 chances
  5 such arm=4^5=1024
  if all arms are in rest position no signals can be made.
  hence total number of signals that can be made=1024-1=1023
  ans=1023.
  
  
• 10 years agoHelpfull: Yes(5) No(1)
• since there are 5 arms with 4 singals each..so 1 arm can make 4 signals in this way 5 arms can make 4^5 signals.but we see that 1 signal out of these 4^5 signals is rest signal.so we have toexclude it..
  therefore total signals will be 4^5-1=1024-1=1023.
• 10 years agoHelpfull: Yes(3) No(2)
• 15 is the answer as each arm has 1 rest position and 3 working positions
• 10 years agoHelpfull: Yes(0) No(6)
• plz explain clearlyyy
• 10 years agoHelpfull: Yes(0) No(3)
• options are.............................................
  a) 1024 b) 1023 c) 1020 d) none
• 10 years agoHelpfull: Yes(0) No(2)
• 4^5-5(rest)=1019....none!!
• 10 years agoHelpfull: Yes(0) No(2)
• 4^5 -1 Ans.
• 10 years agoHelpfull: Yes(0) No(0)