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# Five years ago at Laboratory B, the ratio of doctorate

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Manager
Joined: 14 Dec 2011
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Five years ago at Laboratory B, the ratio of doctorate [#permalink]

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28 Jan 2013, 08:08
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55% (hard)

Question Stats:

51% (01:23) correct 49% (00:58) wrong based on 146 sessions

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Five years ago at Laboratory B, the ratio of doctorate to nondoctorate researchers was 2:3. If no researchers have resigned, what is the current ratio?

(1) In the last 5 years, twice as many doctorates were hired as nondoctorates.

(2) 50 doctorates were hired during the last 5 years.

Thanks & Regards
Vinni
[Reveal] Spoiler: OA

Kudos [?]: 57 [3], given: 77

Math Expert
Joined: 02 Sep 2009
Posts: 41892

Kudos [?]: 129160 [1], given: 12194

Re: Five years ago at Laboratory B, the ratio of doctorate [#permalink]

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28 Jan 2013, 08:33
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Expert's post
Five years ago at Laboratory B, the ratio of doctorate to nondoctorate researchers was 2:3. If no researchers have resigned, what is the current ratio?

(1) In the last 5 years, twice as many doctorates were hired as nondoctorates.
(2) 50 doctorates were hired during the last 5 years.

Each statement alone is clearly insufficient to answer the question. When taken together we'll have that 50 doctorates and 25 nondoctorates we hired during the last 5 years. Now, if originally there were 2 doctorates and 3 nondoctorates, then the current ratio would be (2+50)/(3+25)=52/28 BUT if originally there were 4 doctorates and 6 nondoctorates, then the current ratio would be (4+50)/(6+25)=54/31. Not sufficient.

Hope it's clear.
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Manager
Joined: 16 Feb 2012
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Concentration: Finance, Economics
Re: Five years ago at Laboratory B, the ratio of doctorate [#permalink]

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28 Jan 2013, 08:46
Since we don't know the exact number of doctorate and nondoctorate researchers the answer couldn't be found.
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Intern
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Re: Five years ago at Laboratory B, the ratio of doctorate [#permalink]

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30 Jan 2013, 22:50
a sub 600 level question

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GMAT Club Legend
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Re: Five years ago at Laboratory B, the ratio of doctorate [#permalink]

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09 Sep 2014, 01:29
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Five years ago at Laboratory B, the ratio of doctorate [#permalink]

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24 Dec 2015, 06:53
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
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Re: Five years ago at Laboratory B, the ratio of doctorate   [#permalink] 24 Dec 2015, 06:53
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