October 2001 LSAT Section 3 Question 5

If N is selected for the space flight, which one of the following must also be selected?

amoli078@fiu.edu on August 25 at 12:07AM

Game setup - How do we know that one inexperienced and one experienced means within the group.

I didn't get the N deduction because I'm failing to see where this rule connects to specifically meaning that it has to be one inexperienced G and on experienced G and vice versa with R.

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Emil-Kunkin on August 27 at 04:31PM

Hi, this comes down to the complex distribution of the astronauts. We know there are two experienced and two inexperienced in, and we know we have two of each subset of specialists. Let's see what happens once we put N in

Exp: _ _
Inex: N(r) _

We know that since we have used up N, the other inexperienced astronaut must be one of the three Gs, although we are unsure which of the three

Exp: _ _
Inex: N(r) _(g)

Since we have now determined the specialization of the two inexperienced ones, we know that there is one spot left for a g and for a p on the experienced row.

Exp: _(r) _(g)
Inex: N(r) _(g)

Since there is only one possible experienced astronaut who would fill the r slot on that row, we know F must be in.