Q14 - Morris High School has introduced

[Raiderblue17]

I know its between C and D and I know that the author uses simple fractions without showing the representative population as a whole...

SO>>>> How the heck is one right but the other isn't?

Thanks again!

Great work from all of you

[timmydoeslsat]

I know its between C and D and I know that the author uses simple fractions without showing the representative population as a whole...

SO>>>> How the heck is one right but the other isn't?

Thanks again!

Great work from all of you

You will see how one is right!

The argument says that 1/3 of FT leaving while 1/4 PT leaving.

Thus, more FT is leaving than PT

We know that this isn't the case.

I could say that 90% of Rhode Island agrees with concept X while only 80% of Texas agrees with concept X. Obviously, we know that just because one group has a higher percentage does not mean we conclude things about the number of people.

So, you say you had it down to C and D. That is good.

C) Argument fails to rule out that there are more FT than PT.

D) Argument fails to rule out that there are more PT than FT.


The arguer believes that since a greater proportion of FT than PT, that there is more FT quitting than PT quitting overall.

The arguer already believes that there is more FT quitting than PT.

The arguer, by concluding, more FT quitting than PT, fails to consider that there is more PT overall. Even though PT has a smaller percentage, it could still be more overall than FT.

[bbirdwell]

Yeah, great job getting down to those two choices.

A "flaw" question answer choice that begins with "fails to consider" works like a negated assumption. In other words, all you have to do is consider it, and if it wrecks or logically damages the argument, you've found the flaw.

So in this example, for choice (D) if we consider that there are more PT than FT... suddenly the conclusion is questionable -- not necessarily wrong, just questionable, as it points to the possibility that the author has made a proportion/whole error. And that's all we need.

[dontmesswmeow]

I got this one right and yet I doubt the wording of the answer choice is actually correct.

That's because I think the denominator should be the total number of part time/full time teachers, not all new part time teachers and full time teachers as the choices D & C read.

Anyone?

[ohthatpatrick]

You can prove (D) to yourself more easily, perhaps, with some numbers.

Let's say that there were
80 part time teachers
30 full time teachers

How would you calculate the idea that
"only 1/4 of all part time teachers quit"?

I would take 1/4 of 80, since it's
"1/4 of all part time teachers"

Whenever you take a % of _____
or a fraction of ______
the _____ is the denominator

Similarly, "1/3 of all full-time teachers quit" is 1/3 of 30.

So 20 part time teachers quit, and 10 full time teachers quit.

(D) allows us to create a situation that would contradict the conclusion. Hope this helps.