As it is presented in the passage, the approach to history taken by mainstream U.S. historians of the late nineteenth...

Devinon November 20 at 10:21PM

Game 4, Question 14

In this scenario, the the example given shows the writing out of a four possible hypothetical combinations for when the trains could arrive. The last two violate the fourth rule of not allowing the Tilbury and Victoria to arrive next to each other. How is answer choice A correct if the last two hypotheticals clearly violate the fourth rule?

1 Reply

Irinaon November 20 at 11:28PM

@devinkramer,

Thank you for your question - you are correct, it is a mistake in the explanation. There are four possible combinations though so (A) is still the correct answer choice.

If W arrives before R, we know that Y has to be #4 because if W is #4, R must arrive #5 and is followed by V/T as #6 and #7 but we cannot have VT or TV per the rules, hence W cannot be #4.

__ __ __ Y __ __ __

S arrives before Y and after W - W > S > Y so W cannot be #3. Since we know that T & V must follow R, R cannot be #5 or it will result in TV/ VT combination, thus R must be either #2 or #3, and W must be #1:

W>R/S>S/R>Y> T/V> Q>V/T

We can conclude that overall there are four possible combinations under this scenario:

W R S Y T Q V W R S Y V Q T W S R Y V Q T W S R Y T Q V