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Morris High School has introduced a policy designed to

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Director
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Morris High School has introduced a policy designed to [#permalink]

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01 Oct 2007, 10:47
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Morris High School has introduced a policy designed to improve the working conditions of its new teachers. As a result of this policy, only one-quarter of all part-time teachers now quit during their first year. However, a third of all full-time teachers now quit during their first year. Thus, more full-time than part-time teachers at Morris now quit during their first year.
The argument’s reasoning is questionable because the argument fails to rule out the possibility that

(A) before the new policy was instituted, more part-time than full-time teachers at Morris High School used to quit during their first year

(B) before the new policy was instituted, the same number of full-time teachers as part-time teachers at Morris High School used to quit during their first year

(C) Morris High School employs more new full-time teachers than new part-time teachers

(D) Morris High School employs more new part-time teachers than new full-time teachers

(E) Morris High School employs the same number of new part-time as new full-time teachers

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01 Oct 2007, 10:50
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01 Oct 2007, 11:12
D

The arg assumes school hires more FT than PT teachers.
It is faulty bcos it maybe that it hires more new PT than new FT teachers.
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Re: CR_1000_999: Morris High School [#permalink]

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01 Oct 2007, 12:10
eyunni wrote:
Morris High School has introduced a policy designed to improve the working conditions of its new teachers. As a result of this policy, only one-quarter of all part-time teachers now quit during their first year. However, a third of all full-time teachers now quit during their first year. Thus, more full-time than part-time teachers at Morris now quit during their first year.
The argument’s reasoning is questionable because the argument fails to rule out the possibility that

(A) before the new policy was instituted, more part-time than full-time teachers at Morris High School used to quit during their first year

(B) before the new policy was instituted, the same number of full-time teachers as part-time teachers at Morris High School used to quit during their first year

(C) Morris High School employs more new full-time teachers than new part-time teachers

(D) Morris High School employs more new part-time teachers than new full-time teachers

(E) Morris High School employs the same number of new part-time as new full-time teachers

The argument - more full-time than part-time teachers at Morris now quit during their first year

PT = 1/4
FT = 1/3

If PT > FT then it is possible that despite a lower proportion of PT teachers quitting the absolute number of PT teachers quitting is higher than the absolute number of FT teachers

Assuming 100 PT teachers and 69 FT teachers are hired

1/4 of 100 = 25 > 1/3 of 69 = 23 hence D.
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01 Oct 2007, 19:36
D
The numbers stated in the arugument are only true if there are more Full time folks. THerefore, it fails to rule out the possibility that there COULD be more part-time folks. We do not know.
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02 Oct 2007, 04:22
OA is (D)
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Re: CR_1000_999: Morris High School [#permalink]

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02 Oct 2007, 05:03
dwivedys wrote:
The argument - more full-time than part-time teachers at Morris now quit during their first year

PT = 1/4
FT = 1/3

If PT > FT then it is possible that despite a lower proportion of PT teachers quitting the absolute number of PT teachers quitting is higher than the absolute number of FT teachers

Assuming 100 PT teachers and 69 FT teachers are hired

1/4 of 100 = 25 > 1/3 of 69 = 23 hence D.

I agree with the reasoning and so D.
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02 Oct 2007, 06:29
Got it right. 'D', it is.
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Re: Morris High School has introduced a policy designed to [#permalink]

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26 Mar 2013, 01:24
Re: Morris High School has introduced a policy designed to   [#permalink] 26 Mar 2013, 01:24
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