Q11

[bryanboone1081]

Greetings:

Why would C not be the correct answer for the question below? I think I am looking at this totally wrong. Please help

A rowing team uses a boat with exactly six seats arranged
in single file and numbered sequentially 1 through 6, from
the front of the boat to the back. Six athletes"”Lee, Miller,
Ovitz, Singh, Valerio, and Zita"”each row at exactly one of
the seats. The following restrictions must apply:
Miller rows closer to the front than Singh.
Singh rows closer to the front than both Lee and
Valerio.
Valerio and Zita each row closer to the front than
Ovitz.

If Valerio rows closer to the front than Zita, then
which one of the following must be true?
(A) Miller rows immediately in front of Singh.
(B) Lee rows immediately in front of Valerio.
(C) Zita rows immediately in front of Ovitz.
(D) Singh rows immediately in front of Lee.
(E) Singh rows immediately in front of Valerio.

[lgirlwashlaw]

It is easy.

The rules are :

M_S
S_L/V Or S_VL
V/Z_O

I make deductions based on the rules where the characters go. This is a simple sequencing game.
M 1
S 2
L 3-6
V 3,4
Z 4-6
O 5-6
We know based on the rules where they can go.

The question asks if Valerio rows closer to the front than Zita, then which one of the following must be true?
(A) Miller rows immediately in front of Singh.
(B) Lee rows immediately in front of Valerio.
(C) Zita rows immediately in front of Ovitz.
(D) Singh rows immediately in front of Lee.
(E) Singh rows immediately in front of Valerio.

Using the diagram of where they can go based what must be true:
1 2 3 4 5 6
m s v l z o
m s l v z o
m s v z l o


We know E is wrong because L can before V.

D is wrong because V can go before L

C is wrong because L can come between Z and O.Also, there is nothing stating in the rules L can't go between them. Also, the 3rd rule states S has to come before L and V. The 4 rule says that v and o come sometime before Z. Luckily, L can go either after z or between o and Z.

B is wrong because L does not have to sit immediately in front of V.


Which leaves A as the correct answer. We know that M has to come before S and the second rule s has to come before l/v,which solidifies where it can go.

[dnelson]

I see that you made the following deductions.

M 1
S 2
L 3-6
V 3,4
Z 4-6
O 5-6

1 2 3 4 5 6
m s v l z o
m s l v z o
m s v z l o

Was this in your head, deduced from looking at a tree, or did you write this all out? I figure if you must write it all out, it will consume a lot of time. Is there any faster way to do this?

[timmydoeslsat]

There is a fast way to do this problem. My global diagram is on the right hand side and my local diagram of this question is on the left hand side.



As you can see with all variables being represented in the local diagram, it must be true that M and S are in a block together. What other variable could possibly come between them? None.