A photographer will arrange

Reynard
#1. July 30th, 2007, at 7:05 PM.

only 5 such arrangements:

1 2 3
4 5 6

1 2 4
3 5 6

1 2 5
3 4 6

1 3 4
2 5 6

1 3 5
2 4 6

shilpa
#2. July 30th, 2007, at 7:09 PM.

i think its (B)
if we consider 6 people A,B,C,D,E,F such that A

amar eswar
#3. August 2nd, 2007, at 5:52 PM.

its B

ylmson
#4. August 3rd, 2007, at 6:39 AM.

assuming we label the people in the height order of 1,2,3,4,5,6
first column has 3 possibilities:
1
2
or
1
3
or
1
4

There are 2 possible arrangements for the first two cases, and only 1 possible arrangement for the third case, therefore there are only 5 possibilities. They are all enumerable. I choose (A)

zenith
#5. August 5th, 2007, at 3:27 PM.

very much a)

sharath_s
#6. August 5th, 2007, at 7:07 PM.

ya, its option A.

Hitesh
#7. September 20th, 2007, at 12:49 PM.

The answer is 6… option B….

Consider 1, 2, 3, 4, 5 and 6 as 6 different people with 6 different heights.

Now 1,2 and 3 are the shortest people so they are placed in ascending order from left to right.. They can be arranged only in 1 way.

to arrange remaining people 4,5 and 6 in second row, you can simply have 3! ways.

So total number of ways is: 6.

Dear Take Gre Team please correct me if I am wrong……

Thanks

armen
#8. October 8th, 2007, at 10:25 AM.

Hitesh,

it says “The heights of the people within each row must increase from left to right”, what you are proposing is to have different orders in the second raw, which is not right.

looks like a is the right answer.

thanks

pen name
#9. December 21st, 2007, at 11:28 PM.

the ans is a……….

caulfy
#10. January 4th, 2008, at 1:04 AM.

I’m going to have to say that the answer is:

4 5 6
1 2 3

3 5 6
1 2 4

3 4 6
1 2 5

2 5 6
1 3 4

2 4 6
1 3 5

The key is recognizing that 1 must go in the leftmost position of the first row and 6 must go in the rightmost position of the back row. In addition, it’s impossible to have either 4 or 5 in the middle position in the front row (either option leads to an eventual violation of the rules). Only 2 and 3 can occupy the middle position in the front row. There are 3 possible arrangements if 2 occupies it and 2 possible arrangements if 3 occupies it for a total of 5 possibilities.