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# At the time of admission, 35 percent of all doctorate students at a pa

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Math Expert
Joined: 02 Sep 2009
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At the time of admission, 35 percent of all doctorate students at a pa  [#permalink]

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22 Nov 2016, 04:45
00:00

Difficulty:

95% (hard)

Question Stats:

40% (01:35) correct 60% (01:47) wrong based on 82 sessions

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At the time of admission, 35 percent of all doctorate students at a particular business school have a Ph.D. in a non-business related field. Meantime, 45 newly admitted students have a master's degree as their highest degree. Exactly how many Ph.D. students are there at this business school based on the following statistics at the time of admission for the entire program?

(1) 35 have a doctorate degree completed in a non-business related field.

(2) 45 percent have a master's degree as their highest degree.

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Re: At the time of admission, 35 percent of all doctorate students at a pa  [#permalink]

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22 Nov 2016, 06:37
Let the number of doctorate students be = x = ?
PhD(non biz) = 0.35x
Number of students who have a masters degree = 45

St1: 0.35x = 35 --> x = 100
Sufficient

St2: 45 = 0.45x --> x = 100
Sufficient

Intern
Joined: 17 Aug 2016
Posts: 48
At the time of admission, 35 percent of all doctorate students at a pa  [#permalink]

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22 Nov 2016, 12:23
Vyshak wrote:
Let the number of doctorate students be = x = ?
PhD(non biz) = 0.35x
Number of students who have a masters degree = 45

St1: 0.35x = 35 --> x = 100
Sufficient

St2: 45 = 0.45x --> x = 100
Sufficient

IMHO it is C.

Stm1: says that 35 students have a PhD not related to business, but we don't know how many of the other 65 students have a PhD in business.

Stm2: says that 45% of the students have only a master. This means the 45 newly admitted students plus thoese who were already in the school without a PhD. But we don't know the latter information, therfore Stm 2 is not suff.

1&2: We know that there are 100 students (stm1), therefore the 45% students with only a master need to be the 45 students newly admitted. Thus 100-45=55 are students with a PhD.
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Re: At the time of admission, 35 percent of all doctorate students at a pa  [#permalink]

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22 Nov 2016, 17:59
bazu wrote:
Vyshak wrote:
Let the number of doctorate students be = x = ?
PhD(non biz) = 0.35x
Number of students who have a masters degree = 45

St1: 0.35x = 35 --> x = 100
Sufficient

St2: 45 = 0.45x --> x = 100
Sufficient

IMHO it is C.

Stm1: says that 35 students have a PhD not related to business, but we don't know how many of the other 65 students have a PhD in business.

Stm2: says that 45% of the students have only a master. This means the 45 newly admitted students plus thoese who were already in the school without a PhD. But we don't know the latter information, therfore Stm 2 is not suff.

1&2: We know that there are 100 students (stm1), therefore the 45% students with only a master need to be the 45 students newly admitted. Thus 100-45=55 are students with a PhD.

35 percent of all doctorate students at a particular business school have a Ph.D. in a non-business related field --> This means that if there are a total of x doctorate students then 0.35x have PhD in non business related field.
St1 provides the number of students having doctorate in non business related field as 35. So we can get the value of x.
St2 has a logic similar to St1.
Intern
Joined: 14 Nov 2012
Posts: 23
GMAT 1: 740 Q51 V38
At the time of admission, 35 percent of all doctorate students at a pa  [#permalink]

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07 Sep 2017, 19:33
Vyshak wrote:
Let the number of doctorate students be = x = ?
PhD(non biz) = 0.35x
Number of students who have a masters degree = 45

St1: 0.35x = 35 --> x = 100
Sufficient

St2: 45 = 0.45x --> x = 100
Sufficient

I think there's a problem with your St2 explanation.
"45% have master degree as their highest degree" should mean that the PhD, MD percentage is 55%, 45% respectively (assume that there are only 2 types of admitted students).
So, let z be the total number of admitted students, then we have 0.45z = 45
=> z= 100
=> number of PhD = 0.55 x 100 = 55
It would be a better explanation.
Cheers

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Re: At the time of admission, 35 percent of all doctorate students at a pa  [#permalink]

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21 Dec 2017, 09:48
The answers should not be 'D'. Here 35 refers to the new count ( i.e after adding Masters). So we should not draw 35% x =35 Please help me to understand correctly
Senior Manager
Joined: 02 Apr 2014
Posts: 474
GMAT 1: 700 Q50 V34
Re: At the time of admission, 35 percent of all doctorate students at a pa  [#permalink]

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27 Dec 2017, 12:12
Hi Bunuel,

I have a question. Though i get answer as D.

Statement 1 : 0.35 * doctorate students = 35 => doctorate students = 100 => sufficient

Statement 2: 0.45 of newly admitted students have master's as highest degree.
0.45 * total students = 45 => total students = 100, so number of doctorate students = 55, which is different from statement 1.

Am i missing understanding the question?

thanks
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GMAT 1: 730 Q49 V41
GPA: 4
Re: At the time of admission, 35 percent of all doctorate students at a pa  [#permalink]

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29 Dec 2017, 12:32
Bunuel wrote:
At the time of admission, 35 percent of all doctorate students at a particular business school have a Ph.D. in a non-business related field. Meantime, 45 newly admitted students have a master's degree as their highest degree. Exactly how many Ph.D. students are there at this business school based on the following statistics at the time of admission for the entire program?

(1) 35 have a doctorate degree completed in a non-business related field.

(2) 45 percent have a master's degree as their highest degree.

Hello Bunuel,

I am getting D but the numbers are different? DS can't have 2 solutions. Please throw some light on my below understanding.

My understanding:
Question Stem -- 35% of D = PhD NB and Master Degree = 45

Statement 1:
35=35% of D => D=100 -- Sufficient

Statement 2:
45 = 45% of Total Students => T=100; Therefore, D = 100-45=55 --Sufficient [But the answer is different from that in statement 1]

Regards

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

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Re: At the time of admission, 35 percent of all doctorate students at a pa &nbs [#permalink] 29 Dec 2017, 12:32
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