Q. How many 6 digits no can be formed using 0,1,2,3,5,7?

• wihout repeatition: 5*5*4*3*2*1 = 5*5! = 600
  with repeatition : 5*6*6*6*6*6 = 30*1296 = 38880
• 10 years agoHelpfull: Yes(61) No(2)
• no. of words with all nos. is 6!
  no. of words with 0 in 1st position is 5!
  required no. 6!-5!=600
• 10 years agoHelpfull: Yes(13) No(1)
• It depends can numbers be repeated?
  
  If they can, then you have 6 numbers and thus 6⁶ possible sequences. Now be careful, because some of those sequences have 0 as the first digit--well that's not really a 6 digit number is it? So how many of those 6⁶ have 0 as the first digit? Easy, you have six digits for 5 spots (after the first 0), so that's 6⁵. So there are total of:
  
  6⁶ - 6⁵ = 38,880
  
  If digits cannot be repeated, then similar, but now there is a total of 6! sequences. Again, some of those have 0 as the first digit. So if we choose 0 as the first digit, then there are 5! sequences left for the next 5, so the answer is:
  
  6! - 5! = 600
• 10 years agoHelpfull: Yes(8) No(2)
• i can't understand how 5*5! become.any 1 explain
• 10 years agoHelpfull: Yes(3) No(1)
• Manikandan I PEHLE 10 AND 12 KRKE AAO USKE BAAD M4 MATHS KE QUESTION KRNA
• 10 years agoHelpfull: Yes(3) No(0)
• for the first digit we can have 5 choices (i.e. except 0)
  for the second place we have 6 choices
  for the third place we have 6 choices
  for the fourth place we have 6 choices
  for the fifth place we have 6 choices
  for the sixth place we have 6 choices
  Hence total no.s are = 5*6!=43880
• 10 years agoHelpfull: Yes(2) No(4)
• =5*5*4*3*2*1
  =600 ans...
• 10 years agoHelpfull: Yes(2) No(1)
• 600 when repition is not allowed.
  38880 if repetion is there.
• 10 years agoHelpfull: Yes(1) No(0)
• 6p6=6!=720
• 10 years agoHelpfull: Yes(0) No(16)
• options for first place is 5 (excluding 0),and all others digits are including 0 so 2nd=6 ,3rd=6,4th=6,5th=6,6th=6.... finally,possible ways are 5*6*6*6*6*6=38880
• 10 years agoHelpfull: Yes(0) No(0)
• 6!= 6*5*4*3*2*1= 720. say if the numbers do not be repeated .like ex: 552301
• 10 years agoHelpfull: Yes(0) No(1)