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

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.

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

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,

Jack & Jill went to the hill....In going to hill (upword
Direction)...Jack went to the hill first nd waited for Jill
for "x" hours.. Jack's speed was then twice of Jill.. In
the down word direction Jill can go 3km in a hour, while
Jack can go 1km in 1 hour.. Jill reach the ground 1st nd
waited for Jack for "x" hours.. Total journey they traveled
is 6 km.. Find the speed of Jack...

In a certain department store, which has four sizes of a
specific shirt, there are 1/3 as many small shirts as medium
shirts, and 1/2 as many large shirts as small shirts. If
there are as many x-large shirts as large shirts, what
percent of the shirts in the store are medium?

DATAINTERPRETATION ( 5 QUESTIONS 10 MINUTES )
DIRECTIONS(Q1-5)
THESE QUESTIONS ARE BASED ON THE TABLE BELOW
BRAND
SALES IN JAN’99
PERCENTAGE CHANGE FROM EARLY YEAR
K
7.5
12%
L
10
3%
M
22
-5%
N
34
-10%
O
16
-20%
Q1). Sales of brand M in Jan’98 was what percentage of
Jan’99 sales?
a) 17.22%
b) 24.58%
c) 29.58%
d) 21.22%
e) Cannot be determined
Q2). The ratio of sales of N in 1998 to O sales in 1998?
a) 43 : 34
b) 13 : 10
c) 23 : 13
d) 31 : 22
e) 54 : 43
Q3). What is the proportion of sales of K, l and M to the
total sales of all brands in 1999?
a) 36.28%
b) 26.19%
c) 32.32%
d) 12.23%
e) 44.13%
Q4). By how much have the sales of O and N together fallen
in Jan’99 as compared to Jan’98 ?
a) 32
b) 19
c) 22
d) 27
e) 21
Q5). Which brand faced the maximum changes in the sales from
Jan’98 to Jan’99 ?
a) K
b) L
c) M
d) N
e) O

There are twelve consecutive flags at an equal interval of
distance. A man passes the 8th flag in 8 seconds. How many
more seconds will he take to pass the remaining 4 flags?