There are 4 post box and 4 letters (same). Multiplication of the no. of ways to post the letters in the post box
1) if all post box are same.
2) if all post box are different

• the no. of ways to post the letters in the post box
  1) if all post box are same..... 5 --- (0004,0013,0022,0112,1111)
  2) if all post boxes are different ....4+12+6+12+1 =35
  Multiplication of the no. of ways to post the letters in the post box
  if all post box are same.(5)
  and
  if all post box are different(35)
  = 5*35 =175
• 12 years agoHelpfull: Yes(2) No(1)