can any one plz expalin the ans for 2nd condition?
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.

• for the first condition the no of way is 1....bcoz all r same...
  for the second condition it will b 4^4 ways....bcoz for every letter there are 4 ways to post...
• 12 years agoHelpfull: Yes(0) No(0)
• ans is 1)if all post box are same.
  bcz postbox is fixed and letters we put in postbox may vary.so 4^4=256 ways.bottom 4 represent postbox and another 4 represents letters
• 12 years agoHelpfull: Yes(0) No(0)