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 English Interview Questions (463) General Aptitude Interview Questions (1894) Puzzles Interview Questions (460)
Question
`In how many ways 4 letters can be posted in two post boxes?`
Question Submitted By :: General-Aptitude
I also faced this Question!!     Answer Posted By

# 1
If four letters are different, then with each letter there
are two possibilities, i.e. A letter can be posted in either
of two mailboxes.

Total no. of ways = 2^4 = 16.

 Is This Answer Correct ? 16 Yes 7 No
Ram

# 2
matherchod log nahi pata hao to galat ans kahe ko post krta be
 Is This Answer Correct ? 7 Yes 2 No
Wwwwwwwwwwwwwww

# 3
I think the robbins way
is right. But i couldnt
under stand why did
he multiply the result
by 2

the chances are
none in the fist box
and all in the other
box=4C0=1
1 in fist and 3 in
second=4C1=4
2 in first and 2 in
second=4C2=6
3 in first and 1 in
second=4C3=4
4 in fist and none in
second=4C4=1

so net chance is
4C0+4C1+4C2+4C3+4C4=16

 Is This Answer Correct ? 4 Yes 2 No
Binesh

# 4
as for question have to post atleast 1 letter in 2 box.. i think the posibilty to post 4 letter in 2 box is 3 ..cause
1st box 1 letter and 2nd box 3 letter,
1st box 2 letter and 2nd box 2 letter,
1st box 3 letter and 2nd box 1 letter.

 Is This Answer Correct ? 1 Yes 0 No
Koustav Chakraborty

# 5
4! * 3!=144
 Is This Answer Correct ? 11 Yes 12 No
Arun Jain

# 6
If the letters are thought to be unique than the answer is: 2*2*2*2=8
If the letters are thought to be identical(as in spam mails) than the answer is:
(5,0,0) (4,1,0) (3,2,0) (2,3,0) (1,4,0) (0,5,0)
(4,0,1) (3,1,1) (2,2,1) (1,3,1) (0,4,1)
(3,0,2) (2,1,2) (1,2,2) (0,3,2)
(2,0,3) (1,1,3) (0,2,3)
(1,0,4) (0,1,4)
(0,0,5)
1+2+3+4+5+6 = 21 ways
~Lester

 Is This Answer Correct ? 1 Yes 2 No
Lester

# 7
2

 Is This Answer Correct ? 0 Yes 3 No
Shanthini.pr93@gmail.com

# 8
12 ways
 Is This Answer Correct ? 5 Yes 9 No
Tony

# 9
Assume 1st box 4 letter and 2nd box no letter,
1st box 1 letter and 2nd box 3 letter,
1st box 2 letter and 2nd box 2 letter,
1st box 3 letter and 2nd box 1 letter,
1st box not post and 2nd box 4 letter,
1st box 3 letter and 2nd box 1 letter,

so totally 6ways

 Is This Answer Correct ? 4 Yes 9 No
Karthika

# 10
1 way=1-3
2 way=2-2
3 way=3-1
4 way=4-0
5 way=0-4

 Is This Answer Correct ? 2 Yes 8 No
Priya