q.1 in how many ways can 3 postcards can be posted in 5 postboxes?
q.2.in how many ways can 5 postboxes hold 3 post cards?

• q.1 in how many ways can 3 postcards can be posted in 5 postboxes?
  
  first post card can be posted in any of the 5 post boxes =5c1 ways
  second post card can be posted in any of the 5 post boxes =5c1 ways
  third post card can be posted in any of the 5 post boxes =5c1 ways
  
  number of ways=5c1*5c1*5c1=125=5^3
  
  q.2.in how many ways can 5 postboxes hold 3 post cards?
  first post box can hold 3 post cards in 3c1 ways
  second post box can hold 3 post cards in 3c1 ways
  third post box can hold 3 post cards in 3c1 ways
  fourth post box can hold 3 post cards in 3c1 ways
  fifth post box can hold 3 post cards in 3c1 ways
  so number of ways =3c1*3c1*3c1*3c1*3c1=3^5
• 11 years agoHelpfull: Yes(62) No(3)
• sry frends....previously i posted the wrong answer...
  the correct ans will be 3^5 and 5^3 respectively...
• 11 years agoHelpfull: Yes(9) No(14)
• 1)5^3
  2)3^5
• 11 years agoHelpfull: Yes(8) No(7)
• its 5c2*3! = 60.
  3 postcards can be put into 5 postboxes in 5c2 ways and they can be arranged with 3! ways = 6.
  thus total no of ways are 60.
• 11 years agoHelpfull: Yes(6) No(9)
• is this q's from tcs apti test 2012???
• 11 years agoHelpfull: Yes(4) No(3)
• can any1 please send m tcs new placement pattern urgently on my id nagarkaronkar@gmail.com
• 11 years agoHelpfull: Yes(3) No(4)
• its simple...see....each of the postcard can be out in any of the 5 postboxes...thus each postcard has got 5 option, thus 3 postcard can be put in 3^5 ways.....similarly the second question goes...
• 11 years agoHelpfull: Yes(3) No(6)
• plz give reason why it's answer is 5^3 and 3^5?????
• 11 years agoHelpfull: Yes(0) No(2)
• i think answer should be same in both cases 5^3
• 9 years agoHelpfull: Yes(0) No(0)
• 5^3 and 3^5 ways.
• 9 years agoHelpfull: Yes(0) No(0)
• ans.1 is 125
  ans.2 is 10
  
• 7 years agoHelpfull: Yes(0) No(0)
• both question are similar...................
  to select 3 postcard from 5
  no. of way will be - 5C3 - 10
  1. ans - 10
  2. ans -10
• 3 years agoHelpfull: Yes(0) No(0)