how many 4 digit number can be formed by using the digit 1,2,2,3,3,3,4,4,4,4?


500
630
640
none of these

• none of these
• 9 years agoHelpfull: Yes(0) No(0)
• no of four digit =10*9*8*7 (becoz we have given fixed no. of digit)
  =5040
  
  so ans is non of these
• 9 years agoHelpfull: Yes(0) No(0)
• the answer is (10!)/((4)!(10-4)!)=(10*9*8*7)/(4*3*2)
  =10*3*7
  =210
  none the above is answer.
  
• 9 years agoHelpfull: Yes(0) No(0)