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# Morris High School has introduced a policy designed to

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Director
Joined: 11 Jun 2007
Posts: 637
Morris High School has introduced a policy designed to [#permalink]

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01 Oct 2007, 10:47
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80% (03:09) correct 20% (00:00) wrong based on 17 sessions

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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

Manager
Joined: 09 Jul 2007
Posts: 178

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01 Oct 2007, 10:50
C..
Manager
Joined: 13 Jul 2007
Posts: 121

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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.
VP
Joined: 15 Jul 2004
Posts: 1445
Schools: Wharton (R2 - submitted); HBS (R2 - submitted); IIMA (admitted for 1 year PGPX)
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.
Manager
Joined: 07 Mar 2007
Posts: 197

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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.
Director
Joined: 11 Jun 2007
Posts: 637

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02 Oct 2007, 04:22
OA is (D)
Senior Manager
Joined: 16 Apr 2006
Posts: 277
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.
_________________

Trying hard to achieve something unachievable now....

Director
Joined: 26 Mar 2006
Posts: 631

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02 Oct 2007, 06:29
Got it right. 'D', it is.
Intern
Joined: 25 Mar 2013
Posts: 6
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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