#21 - Global, Must Be True, List

[Dave Killoran]

Complete Question Explanation
(The complete setup for this game can be found here: lsat/viewtopic.php?f=303&t=7341)

The correct answer choice is (A)

The Not Laws show that G cannot attend the first, second, third, or sixth classes. Thus, G is shown as a dual-option on the fourth and fifth classes, and answer choice (A) is correct.

[studyhelp20]

Dear Power Score Staff,

Could you please provide an explanation of the correct answer for this question? Along with explanations of the incorrect answers? Thanks for the help.

Sincerely,
Brennan

[Rachael Wilkenfeld]

Hi Brennan,

The more information you can give us on your thought process the more we can help you figure these out.

For this one, we want to know where G could go. To do that, we want to think about how many slots must be filled before G, and how many must be filled after G.

To put G as early as possible, we have to put a male in first, because a male must be before K, who must be before all the other female students. We know K has to be before the other female students (including G), so we put K in 2. IL also has to be before G, so we'd put those students in slot three. That would put G in slot 4. That's the earliest G could possibly go.

Now we try to push G one slot later. Can we do this? Sure. We know P and O both need to be after G, but they could be in the same slot 6. N could be in 1, K in 2, IL in 3, S in 4, and that would put G in fifth. That's a fine solution too.

Can we put G in the final spot? No, because we know that P and O both need to go after G so G cannot be last.

That leaves us with just slot 4 and 5, answer choice (A).

Hope that helps!
Rachael