the number of positive numbers not more than 10 digits formed by using 0,1,2,3 is

• since the qn says not more than 10 digits,so considering the cases of 1 digit,2 digit n so on till 10digit no
  =3+3*4+3*4^2+3*4^3+3*4^4+3*4^5+3*4^6+3*4^7+3*4^8+3*4^9
  =3(1+4+16+......+262144)
  =3(4^10-1)/(4-1)
  =4^10-1
  =1048576-1
  =1048575
  
• 11 years agoHelpfull: Yes(6) No(0)
• 3 * 4^9
  
  ( 3 multuplied for the first place, the rest of the places any digit can come, repeatedly
• 11 years agoHelpfull: Yes(3) No(1)
• ans :- 9!*9!
  10 digits number, means 10th place should not be 0 so its 9! and other remaining 9 digits are 9!. so ans is 9!*9!
• 11 years agoHelpfull: Yes(0) No(6)
• As no of digits can be between 4-10(assuming i have to use all 4 digits),
  so 10C4*9C4*8C4*7C4*6C4*5C4*4C4 wud be the ans.
• 11 years agoHelpfull: Yes(0) No(1)