Five years ago at Laboratory B, the ratio of doctorate

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

28 Jan 2013, 08:08

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

28 Jan 2013, 08:33

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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.

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.

Answer: E.

Hope it's clear.
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Re: Five years ago at Laboratory B, the ratio of doctorate [#permalink]

28 Jan 2013, 08:46

Since we don't know the exact number of doctorate and nondoctorate researchers the answer couldn't be found.
The answer is E.
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Re: Five years ago at Laboratory B, the ratio of doctorate [#permalink]

30 Jan 2013, 22:50

a sub 600 level question

Re: Five years ago at Laboratory B, the ratio of doctorate [#permalink] 30 Jan 2013, 22:50

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Five years ago at Laboratory B, the ratio of doctorate

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Five years ago at Laboratory B, the ratio of doctorate

Five years ago at Laboratory B, the ratio of doctorate

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