How many 5 digit numbers can be formed with using 1,2,3,4,5,6,7,8 digits?

• 8*8*8*8*8=32768
  as unit place is filled in 8 ways .... and so tens place.. and so on.....
  so , solution is 8^5=32768(universal law of counting)
• 11 years agoHelpfull: Yes(100) No(19)
• if repeatation allowed then 8^5
  else if not allowed then 8*7*6*5*4
• 10 years agoHelpfull: Yes(77) No(5)
• no of ways = 8C5
  8*7*6/3*2 = 8*7 = 56
  answer = 56
• 11 years agoHelpfull: Yes(20) No(70)
• 8p5=8!/(8-5)!=6720
  There 6720 numbers be formed
• 11 years agoHelpfull: Yes(20) No(12)
• If repition allowed : 8*8*8*8*8
  8^5
  repition not allowed:8*7*6*5*4=6720
• 10 years agoHelpfull: Yes(11) No(1)
• if it is repeated 5^8 else if it is not repeated 8*7*6*5*4=8!/5! :)
• 11 years agoHelpfull: Yes(10) No(2)
• we have to select 5 digits from the given 8 digits therefore 8c3=56
• 11 years agoHelpfull: Yes(6) No(5)
• 8*8*8*8*8=32768
• 10 years agoHelpfull: Yes(5) No(1)
• 8*8*8*8*8=32768
• 10 years agoHelpfull: Yes(4) No(0)
• if repetition is allowed then ans is 8*8*8*8*8 = 32768
  if repetition is not allowed then ans is 8*7*6*5*4 = 6720
• 10 years agoHelpfull: Yes(3) No(0)
• for the 1st digit we hav 8 way ,for 2nd digit we hav 8 way and so on then the ans will be =8pow(5)(here repition is allowed)
• 10 years agoHelpfull: Yes(2) No(0)
• 8^5=32768
  A/C to law of aounting
• 10 years agoHelpfull: Yes(2) No(0)
• 8^8 =32768 is right
  
• 10 years agoHelpfull: Yes(1) No(5)
• According to permutation it would be 8p5 and when we solve it it would be (8!/3!) then the ans is 6720
• 10 years agoHelpfull: Yes(1) No(2)
• 8p5=8!/(8-5)!=6720
• 10 years agoHelpfull: Yes(1) No(0)
• Total 8 digits so, we need 5 digit numbers then they are not specified any condition here so assume repetation allowed,
  then ans will be 8^5=32,768.
• 10 years agoHelpfull: Yes(1) No(0)
• 8p5= 8!/(8-5)!
  = 8*7*6*5*4/3*2
  = 1120.
• 10 years agoHelpfull: Yes(1) No(2)
• sorry abt the earlier post,
  the correct calculation is :
  8p5 =8!/(8-5!)
  =8*7*6*5*4*3*2/3*2
  =6720
• 10 years agoHelpfull: Yes(1) No(0)
• if repeatation allowed then,ans=8^5;
  if repeatation not allowed, then ans=8*7*6*5*4=6720;
• 10 years agoHelpfull: Yes(1) No(0)
• 8*8*8*8*8=32768
• 10 years agoHelpfull: Yes(1) No(0)
• according to permutation and combination
  8c5=8!/(8-5)!
  =8!/3!
  = 8*5*6!/3*2!
  =56
• 8 years agoHelpfull: Yes(1) No(0)
• 1234(5678)
  5 digit=5p5=120
  4 digit=4p4=24
  total combination=120*24=2880
• 11 years agoHelpfull: Yes(0) No(5)
• 6720
  how many ways we can arrange 8 digits in 5 positions
  8P5=8!/(8-3)!
• 10 years agoHelpfull: Yes(0) No(5)
• 8^8
  because there is no repeation
  
• 10 years agoHelpfull: Yes(0) No(6)
• since with repetition the the no. of ways a 5 digit number formed is 8*8*8*8*8
  
• 10 years agoHelpfull: Yes(0) No(0)
• if repeatation is not allowed then
  ans is=8*7*6*5*4
  
• 10 years agoHelpfull: Yes(0) No(0)
• 8C5*5!
  no of ways 5 no can be selected=8C5
  no of ways it can be arranged=5!
• 10 years agoHelpfull: Yes(0) No(0)
• 8p5 =8*7*6*5
• 10 years agoHelpfull: Yes(0) No(1)
• ----- i.e 5 spaces, so r=5
  no. of digits n=8
  there is a direct formula=n^r=8^5=32768
• 10 years agoHelpfull: Yes(0) No(0)
• 8P5 (Because its a arrangement so we can solve it through Permutation)
  
  8*7*6*5*4=6720
• 10 years agoHelpfull: Yes(0) No(0)
• arrangement can be made as 8p5=336
  
• 10 years agoHelpfull: Yes(0) No(0)
• 2*root(2):1
• 10 years agoHelpfull: Yes(0) No(1)
• ans is 4*5*6*7*8=6720
  and sorry for previous ans that ans is for #M40007881.
• 10 years agoHelpfull: Yes(0) No(0)
• permutation& combination then
  8p5=8*7*6*5*4=6720 Ans
• 10 years agoHelpfull: Yes(0) No(0)
• 8^5 if repetition is allowed
  8*7*6*5*4 if repetition is not allowed
• 10 years agoHelpfull: Yes(0) No(0)
• 6720
  8*7*6*5*4=6720
• 10 years agoHelpfull: Yes(0) No(0)
• solution:
  8^5=32768 ans
• 10 years agoHelpfull: Yes(0) No(0)
• 8C5=8!/3!=5760
• 10 years agoHelpfull: Yes(0) No(0)
• (8c5)+8=336+8=344
  +8 is for combination formed by a single digit
• 10 years agoHelpfull: Yes(0) No(1)
• 8C5 = !8/!5*!8-5= 8*7*6/3*2=8*7=56
• 7 years agoHelpfull: Yes(0) No(0)