how many 4 digit number do not contain 3 or 6?

• As ask all the 4 digit number , assuming if repeating allow
  there the 8 digit 0,1,2,4,5,7,8,9
  for the 4th digit from unity except 0 all can be there by 7way and in remaining digit all digit can be there by 8 way
  hence result : 7*8*8*8 = 3584
  
  if there is repeation not allow then
  result : 7*7*6*5 = 1470
• 11 years agoHelpfull: Yes(22) No(2)
• It is not stated wheather the digits can be repeated or not!
  if can be repeated then.
  7*8*8*8=3584
  we can't have(0,3,6)in 1st position
  (3,6)in 2nd position and similarly at 3rd nd 4th.
• 11 years agoHelpfull: Yes(14) No(1)
• 7 ways to fill 1st position(except 0,3,6)
  rest place can be filled by=8*8*8 ways
  so,7*8*8*8=3584
  if repeatition not allowed then,
  7*7*6*5=1470
  
• 11 years agoHelpfull: Yes(5) No(1)
• bhai there is 3 or 6 it is not 3 and 6,,,,,so we have to find out for both differently....once neglect 3 and another tym neglect 6 and add them.
• 11 years agoHelpfull: Yes(4) No(0)
• 3584
  applt permution & combination
  7*8*8*8=3584
• 11 years agoHelpfull: Yes(2) No(1)