Answers

2014-07-16T20:41:58+05:30
There are (9*9*9)729 ways to form with 3 digit number with non zero digits if they are repeated.
If they are not repeated then (9*8*7)=504 3 digits numbers are forms.
2 2 2
  • Brainly User
2014-07-16T21:34:41+05:30
Use of some concept of permutations so numbers can be repeated
so 3 numbers needed to be arranged taken 2 at a time
so 3 × 3 = 9 numbers can be formed
 and if not repeated  ³P₂ =  3 × 2 = 6 numbers
1 1 1